List of Teen Wolf characters

Tyler Posey

Scott McCall is the main protagonist of Teen Wolf, the True Alpha werewolf, and the leader of his Pack. In "Wolf Moon", Scott is bitten by Peter Hale and transforms into a werewolf. He begins a relationship with Allison Argent, a new student whom he later discovers to be part of a werewolf-hunter family. Scott lives with his mother, Melissa McCall, and has a part-time job at Beacon Hills Animal Clinic as an assistant to the veterinarian Alan Deaton, who is his father figure. In Season 1, with the help of his best friend, Stiles Stilinski, and mysterious werewolf Derek Hale, Scott struggles to control his transformations, balance his high school life with being a new werewolf, and keeping his loved ones safe from the dangers his new life presents. He gains success controlling his shifting by thinking of Allison, realizing he is in love with her.

Scott is naturally good-natured, kind-hearted, protective and caring of those he loves. He has a solid sense of morals and ideals, and over the series exchanges his initial social awkwardness and his tendency to let his emotions get the best of him for a clear sense of duty in being a burgeoning leader in the supernatural world. In the Season 1 finale, Scott and Allison solidify their relationship after Allison learns he's a werewolf and realizes his lies were to protect her. In Season 2, Scott and Allison are very much in love, but their relationship is strained first by Allison's parents forbidding them to be together and later by Allison's violent behaviour because of Gerard's manipulation of her mother's death. Originally, Scott saw his werewolf status as a curse and wished to find a cure, but, by the end of Season 2 after Allison and Melissa accept his new life, he now sees his powers as a gift to protect those he cares for, and save lives. After Allison apologizes for her amoral actions, they break up because Allison needs space, but they still care for each other afterwards. After Gerard's defeat and Jackson's rescue in the Season 2 finale, Scott gains a close friend in fellow werewolf Isaac Lahey, and overtime comes to bring out the humanity in Derek.

In the Season 3 premiere, Scott gets a tattoo of two bands around his left upper arm with Derek's help. He sees the mark as a reward for having let Allison go. In the episode "Currents", Deaton confirms that Scott has the potential to be a True Alpha, one whom can rise to Alpha status purely by sheer strength of character and willpower rather than by dominance, conquest or killing. Such an Alpha is the rarest of all werewolves. In "Alpha Pact", Scott temporarily sacrifices himself along with Stiles and Allison in a Druid ritual to save their parents from being sacrificed for the Darach, Jennifer Blake. In "Lunar Ellipse", Scott and Derek defeat the Darach, and Scott fully awakens his True Alpha status. Scott also begins to refer and consider his close friends as his Pack. Scott later learns his father, Rafael is back in town. He and Melissa aren't too happy about this, as he'd left the family when Scott was only a toddler. In Season 3B, because of his Druid sacrifice, Scott now carries the burden of having a darkness around his heart like a scar. This causes him fear of shifting into his new Alpha form. After some "aid" and words of encouragement from the twins Ethan and Aiden, Scott regains confidence over his shifts. Scott is hurt when Allison and Isaac develop a romantic relationship but eventually comes to terms with it. Scott starts a new romance with Kira Yukimura after learning she likes him and she is also a Kitsune. When Stiles is possessed by the Nogitsune, Scott is determined to separate the Dark spirit from Stiles without his best friend dying. In "De-Void", Scott and Kira share a kiss after she promises him they'll save Stiles. Scott uses an Alpha's power to meld minds so to enters Stiles' mind with Lydia. Because Stiles is in his Pack, Scott uses an Alpha's roar, allowing Stiles to break free of the Nogitsune. In "Insatiable", Allison has been fatally stabbed by the Oni. He tries to save her life by taking her pain, but can't. Allison comforts Scott, telling him she is in his arms and she loves him. Allison dies. Devastated, Scott kisses Allison's forehead. In the Season 3B finale, "The Divine Move", Scott defeats the Nogitsune with an Alpha's Bite, as the Dark Kitsune can't be both a Fox and a Wolf. At Season 3's end, Scott moves on with his life mourning Allison.

In Season 4, Scott is trying to come to terms with Allison's death. He initially has his relationship with Kira on hold, but eventually Scott decides to move on and give in to his feelings for her, sharing a deep kiss with her. In "Muted", Scott is forced to Bite Liam Dunbar, to save Liam from falling to his death. Consequently, Scott takes Liam under his wing, helping him adjust to being a werewolf and protecting him. Scott vows to keep his friends from dying, and to stop the Dead Pool. Upon learning Rafael killed an assassin to save Stiles' life with no way otherwise, Scott contemplates should he resort to killing his opponents. In "Monstrous", Scott saves young Lori Rohr from death then attempts to kill the assassin. This action causes Scott to Evolve, triggering a transformation into a new monstrous shape, but when the assassin surrenders, Scott stops at the last minute, sparing the man's life. He permanently gains additional fangs afterwards from the Evolution. In "A Promise to the Dead", Scott and Kira go on their first date, but Kate Argent and her Berserker attack them and they are both taken to La Iglesia, where Kate transforms Scott into a new Berserker. In "Smoke & Mirrors" Scott as a Berserker, under Kate's control, attacks his friends. Liam reaches Scott's spirit, and Scott breaks free of the Berserker form. Scott then faces Peter, having figured out the latter's plan to conspire with Kate to have Scott killed. He clashes with his werewolf sire fiercely. Peter goads Scott he'll have to kill him if he wants to beat him. When Peter threatens Liam, Scott Evolves again, gaining new super-strength. He defeats Peter while also sparing him, deciding for good he's an Alpha instead of a monster while declaring that Peter was always the other way around.

In Season 5A, Scott and his Pack start senior year, with Scott continuing his mentoring Liam. Scott plans to get into UC, Davis to become a vet following in Deaton's footsteps. Theo Raeken, his grade-school friend, a werewolf, returns to Beacon Hills wishing to join Scott's Pack which Scott considers. Scott eventually tells Kira he loves her. Scott is unnerved by Kira's bloodthirsty behavior due to her Kitsune Evolution, admitting to Theo he's losing trust in her. Scott reads the subliminally coded novel based on the Dread Doctors. Unfortunately, its effects on Scott result in his asthma psychosomatically returning. When Hayden Romero, Liam's love interest is identified as a Chimera, Scott takes rash action using Hayden as bait in a sting operation to capture the Dread Doctors, to Liam's fury. Unfortunately, the plan fails with Liam and Hayden captured, but both are rescued by Theo afterwards. Scott has an emotional breakdown over his failed leadership, Kira having to leave Beacon Hills (sharing a goodbye kiss with her) and is overwhelmed by the distrust and secrecy in everyone around. Upon learning of Donovan Donati's death at Stiles' hands, and because of Theo's lies, Scott kicks Stiles out of the Pack. In "Status Asthmaticus, Scott finally uncovers Theo's true nature, his agenda to take Scott's Pack and True Alpha status for himself by spiking his inhaler with wolfsbane to weaken him and having Liam, enraged and supercharged due to the supermoon, kill him. Mason snaps Liam out of his rage, but Theo kills Scott afterwards. He is revived by Melissa. In "The Last Chimera", Scott is disheartened, broken over his loss, his mortal wound from Theo not healing, and his werewolf abilities left faulty. Despite the rift in his friendship with Stiles, he and Scott figure out how to save Stilinski's life and succeed. Scott later gets his confidence back and takes his mom's advice to bring back hope for his Pack. He marks this promise with a symbol, his tattoo, the symbol for his Pack. Amongst the tension with Theo's Chimera Pack, and the bloodbath brought on by the Dread Doctors' success, the Beast of Gévaudan, Scott ultimately pulls his wayward Pack back together including fixing his relationships with Stiles and Liam and reuniting with Kira.

"Teen Wolf: The Hunt", a Teen Wolf inspired social network game for Facebook, states that Scott was born on October 6. He likes guitars, horror films, and skateboarding, and is a fan of The Black Lips, Kids of 88, Blink-182, and Lost in Kostko (Tyler Posey's band in real life, in which he plays guitar and sings lead vocals).

Crystal Reed

Allison Argent is Scott McCall's first love, a member of the Argent family a long line of werewolf hunters, and a member of Scott's Pack. Allison is best friends with Lydia, and later on the girlfriend of Isaac Lahey. Allison is naturally caring, sweet and charming. Throughout the series, Allison falls deeply in love with Scott. She has a natural talent for archery and is an accomplished gymnast. As a werewolf hunter, Allison displays skills in hand-to-hand combat, wiring vehicles, first aid, hunting werewolves and weaponry such as Chinese ring daggers, as well as her archery skills. During Season 2, struck with grief over her mom Victoria's death, her personality changes; she temporarily becomes reminiscent of Kate -- bloodthirsty and cold-hearted. She later shows a genuine guilt and contrition for her actions. At her best, Allison is strong-willed and immensely loyal to her loved ones, going to great lengths to protect them.

In the pilot, "Wolf Moon", Allison meets Scott McCall on her first day of school. There is instant chemistry between the two and they begin a romantic relationship. She is at first unaware of Scott life as a new werewolf, and her family's werewolf-hunter crusade. Her aunt Kate reveals the supernatural world to her in "Co-Captain" including her family's werewolf-hunter life by showing her a captured Derek. In the Season 1 episode "Formality", Allison is shaken up after the revelation, but she decides to be strong. She's shocked further when it's revealed Scott is a werewolf at the school formal. In the Season 1 finale, Kate entices Allison into joining her in hunting the Betas. Allison confronts Scott over his lies, but later she learns what Kate truly is, witnesses Peter Hale kill her as revenge for the Hale fire, and helps to defeat Peter. Realizing that Scott's dishonesty was to protect her, Allison kisses Scott and tells him she loves him. In Season 2, Scott and Allison are in love, but carry on their romance in secret after Chris threatens Scott and she promises to never see Scott again. Her grandfather, Gerard, decides that it is time she be trained to be an official hunter, which in her case means being groomed to eventually succeed her mother as the family's leader. Allison helps Scott and Stiles deal with the Kanima and its mysterious Master. She is devastated in "Party Guessed", when she learns that her mother Victoria is dead. She is later corrupted by Gerard emotionally, who uses Victoria's suicide to use her to attack and kill Derek's pack, straining her relationships with her friends and Chris. She comes close to murdering Erica and Boyd, but Chris shoots her bow out of her hand. In the Season 2 finale, when Gerard holds her captive with the Kanima so he can force Scott to have a paralyzed Derek Bite him to cure his cancer, Allison realizes Gerard's true intentions, and her mistake. Allison, saddened by the death of her mother and feeling guilt over her actions, breaks up with Scott. Scott accepts this. Allison also reconciles with Chris, after all they've lost.

At the start of Season 3, Allison returns to Beacon Hills having spent the summer with Chris in France and has had no contact with Scott whatsoever in the past four months. Although she and Scott are no longer together, they still care deeply for each other. She and Chris have made a pact to lay aside their family legacy to start a real, normal life. Eventually Allison finds out from Scott that Victoria tried to murder him back in Season 2 which is why Derek Bit her, to save Scott's life. She accepts this. In violation of her agreement with her father, she begins to help Scott and Derek fight against the Alpha Pack. Allison and Isaac also mend fences as she attacked him during her moral spiral, so much that they frequently partner up to deal with the current situation and they develop feelings for each other. Isaac is chosen as her tether when she has to undertake a dangerous ritual to save her missing father from being sacrificed by Jennifer Blake, the Darach. Deaton warns her along with Scott and Stiles that sacrificing themselves, temporarily, will have lasting mental effects on them, such as having a permanent darkness around their hearts. In "Lunar Ellipse", Allison, with help from Isaac, finds the parents in the root cellar just before Jennifer sacrifices them. In response to the Nemeton's activation, Allison convinces her father to bring both of them out of retirement, accepts her role as leader of the family and states a new code: "Nous protégeons ceux qui ne peuvent pas se protéger eux-mêmes": "We protect those who cannot protect themselves" in English.

In "Anchors", as a result of her sacrifice to the Nemeton, Allison has hallucinations of Kate and trembling which interferes with her motor and archery skills. Using her new code as an anchor, Allison regains her confidence and skills, saving Malia Tate's life. Allison appears slightly hurt, but shows acceptance when Scott starts going out with Kira. After a series of fits and starts, Allison also starts acting on her feelings for Isaac, entering into a romantic relationship with him. Isaac is electrified and induced into a coma by a trap set by off the Nogitsune saving her life. In "The Fox and the Wolf", Allison suffers a minor breakdown from all the pressure on her shoulders, confessing to Sheriff Stilinski she seems to always feel scared due to the dangers and she's conflicted over her feelings with Scott and Isaac, the latter she thinks could be dying. In "De-Void", to her content relief Isaac recovers, and spends the night with her. With Kira's help, she keeps him and the twins at bay whilst they are under the Nogitsune's control. After Lydia is kidnapped by the Nogitsune in "Insatiable", Allison sets out to search for her with Isaac. She is pleased that Isaac was himself when he slept with her before the Nogitsune's fly took control. In the meantime, Chris shows her how to cast her silver bullet as part of her allegiance to the Code to 'graduate' as a hunter. She opts to make a silver arrowhead instead, since the bow is her weapon. She tells Chris she loves him and is proud of what they've done. At Camp Oak Creek, the Nogitsune gains control of the Oni and turns them against Kira, Isaac, and Allison. During the fight, Isaac is slashed by the Oni and is about to be killed. Allison draws her final arrow, her silver arrowhead and fires it into the Oni, destroying the demon and saving Issac. Another Oni runs her through with its sword. Allison collapses into Scott's arms, and he tells her that Lydia is safe. Dying, she comforts a horrified Scott, saying it's perfect, that she's in the arms of her first love and tells Scott she loves him. She tells Scott he has to tell her father something. Allison dies.

In the Season 3 finale, "The Divine Move", Isaac figures out Allison wanted Scott to tell Chris that the Oni are vulnerable to silver. She had forged four additional arrowheads, one for each demon. Chris and Isaac head to the school, joining the final stand against the Nogitsune, and using the arrowheads, destroy the last of the Oni, avenging Allison. After the Nogitsune's defeat, Scott, Stiles and Lydia return to their normal lives mourning their close friend. Chris and Isaac leave Beacon Hills together to help each other cope.

In Season 4, the loss of Allison has left its mark on everyone; Scott, Chris and her friends, while still mourning, attempt to come to terms with her death. At Season 4's end, Meredith Walker reveals she had put the Dead Pool online, because of how many people had died as a result of Beacon Hills' supernatural forces, with her Hearing Lydia's anguish to Allison's death being the catalyst. Likewise, Kate Argent, blaming Scott and his Pack for Allison's death, had plotted all along to have them killed in petty vengeance. In the Season 5 premiere, Allison is remembered when Scott's Pack begin senior year, writing their initials for the annual senior scribe: Scott adds Allison's initials. Lydia believes Allison is still with them.

"Teen Wolf: The Hunt", a Teen Wolf inspired social network game, states that Allison was born on March 19 in Elkhorn, Wisconsin. She likes archery, running, and Unicef, and is a fan of Karmin, Arcade Fire, Florence and the Machine, and Vampire Weekend.

Dylan O'Brien

M. "Stiles" Stilinski is Scott's best friend, he and Scott consider each other brothers, as well as a member of his Pack. "Stiles" is not his first name; only creator Jeff Davis knows his real name and that it was his maternal grandfather's name. Stiles is very sarcastic, but has a very quick mind, being intelligent and clever if somewhat impractical. His intelligence is shown very early on when he figures out that Scott is becoming a werewolf and helps him adapt to his new life. Stiles is Scott's sidekick and confident, helping the young werewolf deal with the supernatural events that plague the town. The show alludes to him having attention deficit hyperactivity disorder through references to his Adderall use, which lends to his fidgeting gestures and frequent flailing.^[4] Stiles often provides comic relief to the otherwise dramatic events surrounding him and Scott. Stiles' eagerness and caring nature have constantly put him in danger, nevertheless he continues to help, support and protect his supernatural friends.

Stiles shares a close and affectionate relationship with his father, Sheriff Stilinski, partially due to the death of his mother, Claudia. Stiles is shown to be very emotional and insecure over his mother's death; he was with her when she died. Stiles was 8 years old at the time, and suffered panic attacks afterward. He blamed himself for her death and fears that his father blames him. Stiles, throughout Seasons 1, 2 and 3, has an intense, unrequited love for Lydia Martin, having harbored a crush on her since the 3rd grade. He has a simultaneously adversarial and allied relationship with Derek Hale. Stiles attempts to stand up to Derek, but the werewolf tends to scares him into submission. They help each other out and save each other's lives multiple times, and by Season 3, they are reluctant allies. In Season 3, Stiles is shown to be working alongside Lydia to figure out who is the culprit behind the Human Sacrifices in Beacon Hills and they have a closer, dynamic that suggests Stiles' love for her has changed from a simple boyhood crush into something deeper. He also wishes to keep his father out of the supernatural world out of fear he could get him killed, not wanting to lose both his parents. When the Darach kidnaps his father for the Guardian sacrifice, Stiles eventually sacrifices himself temporarily along with Scott and Allison to save their parents, with Lydia as his Tether due to their evidently extremely strong connection. He is finally reunited with his father at the end of the mid-season finale "Lunar Ellipse", with the new burden of having a "darkness" forever shrouding his heart. With his father finally brought into the supernatural business, the two are now closer.

As a result of the Druid sacrifice, in "Anchors", Stiles suffers from hallucinations, sleep paralysis and partial dyslexia, as well as the fact the sacrifice left a door to his mind open. Later, after using his natural intelligence to rescue Lydia from a steel jaw trap and helping to reunite the werecoyote Malia Tate with her father, Stiles' symptoms are cured. However, Stiles is later revealed to be possessed by a Nogitsune, a Dark kitsune. In "Riddled", Stiles comes face to face with the Trickster in his visions asking the riddle, "Everyone has it, but no one can lose it", which Stiles, terrified, eventually solves as a "shadow". Stiles comes to the realization he's possessed when the Void Kitsune assumes his very face. Possessing Stiles, the Nogitsune causes a slew of attacks that leave innocents injured and dead. The Nogitsune's hold over Stiles is temporarily broken when Deaton poisons Stiles with letharia vulpina. In "Echo House", Stiles, to prevent the Nogitsune from harming anyone else, has himself institutionalized at Eichen House. He's shown around by his roommate Oliver. He sees that Malia is also interned there. With her help, Stiles searches for the connection between the Nogitsune and Eichen House. Stiles explains his situation to Malia, and soon after that, they kiss and sleep together. Oliver who is being controlled by the Nogitsune, attacks them both. Stiles gives up his fight with the Nogitsune, letting him back in so that he will spare Malia. In "De-Void", Scott enters Stiles's mind and using an Alpha's roar, Stiles is finally separated from the Nogitsune, but the Void kitsune has taken on his shape. Stiles is shown to be in constant internal pain and freezing, while the Nogitsune grows stronger. After Allison's death, Stiles, while growing consistently weaker in "The Divine Move", he goes along with Scott, Lydia and Kira to the school to make a final stand against the Nogitsune. The Kitsune traps them in an alternate dimension at the school and are surrounded by the Oni. Stiles realizes that the winter reality is only an illusion. He has the foursome endure the Oni's attacks until they escape the illusion the Nogitsune has trapped them in, pulling off a divine move that turns 'the game' around. Scott then Bites the Nogitsune, defeating the Dark Kitsune, winning the game, allowing Stiles to become whole, fully recovering.

In Season 4, Stiles is shown to hold himself in deep horror over the Nogitsune's possession of him, remembering everything he did while "feeling powerful". He is in a relationship with Malia, he helping her adjust to a regular human life. Upon learning of the Dead Pool, Stiles sets up a murder board in his room to learn who's behind the money. Stiles is reluctant to tell Malia about her true parentage to Peter because of the sociopathic werewolf's past actions. However she soon discovers the truth herself, straining their relationship. In 'Perishable', Stiles and Lydia following clues leading to Eichen House, are almost murdered by Brunski and discover Meredith has been 'the Benefactor' all along. In 'Monstrous', Stiles and Malia locate and shut down the computer servers that house the Dead Pool, terminating all the Benefactor's contracts. At the end of Season 4, Stiles starts a new investigation to find Malia's biological mother, the Desert Wolf. In Season 5, Stiles is anxious of senior year, hoping his friends will remain together afterwards whilst attending college in the bay area. He is suspicious of newcomer Theo Raeken, who says he's come to join Scott's Pack, convinced Theo's not "the grade-school friend" Scott and Stiles remember. When Scott asks Stiles why he can't just extend people the benefit of the doubt, he responds frustrated that Scott trusts too much. In "A Novel Approach", Stiles is attacked by the Chimera, and petty enemy of his dad, Donovan Donati. In the ensuing fight, he kills Donovan in self-defense and by accident. Guilty and horrified, he keeps quiet, not telling anyone. His relationship with Malia becomes rocky as a result. Theo reveals he knows about Donovan, blackmailing him to keep quiet over Theo's killing a Chimera, allegedly to save the both of them. Stiles keeps an eye on Theo, but eventually admits to him his killing Donovan to save himself at the moment felt good, but fears he'd lose Scott because killing is against Scott's moral code. In "Lies of Omission", Stiles is confronted by Scott about Donovan, the both of them under false impressions due to Theo's machinations. Scott declares they shouldn't have to kill the people they're trying to save. Stiles fires back, that not everyone can be True Alphas, that some people have to make mistakes, that some people "are human". In "Status Asthmaticus", Stiles' relationship with Malia is over. Stiles learns of Theo's plan to take Scott's Pack for himself, and that Scott is in danger, but Theo forces him to choose between saving Scott or his father. Stiles in incensed, but rushes to save his father.

In Season 5B, Stiles is overcome with worry for his dad at the hospital, flashing back to his mom's funeral. He is furious towards Scott for trusting Theo, their bond severely damaged. In the end, they manage to save Stilinski. Stiles and Stilinski talk about Donovan's death: Stiles confesses to his dad he couldn't tell him or anyone, and felt like he wanted Donovan dead. His dad assures, comforts and advises Stiles it was self-defense. He's told that while Stiles has lost something and won't get it back, he'll get some of it back by forgiving himself. Stiles takes his father's advice to forgive and makes things up with Scott. He tells the whole story about Donovan's death to Scott, they ultimately patch up everything when Scott blames himself for just believing Theo, and that of all the people who'd get a little blood on their hands, it should have been him.

"Teen Wolf: The Hunt", a Teen Wolf inspired social network game, states that Stiles was born on April 8.^[5] He likes drumming, snowboarding, and the New York Mets. He is a fan of the bands The Ramones, The Offspring, Mumford and Sons, All Time Low and Slow Kids At Play (Dylan O'Brien's band in real life, in which he plays drums).

Tyler Hoechlin

Derek Hale is a werewolf by birth. Derek lived in Beacon Hills with his family, a Pack of both werewolves and humans. At age 15, Derek fell in love with a girl named Paige. Wanting to be with her forever, Derek, with some manipulative persuasion from his uncle Peter, came up with the idea of turning her into a werewolf. Peter asked Ennis, an Alpha werewolf, to give her the Bite. However, Derek, hearing Paige's screams, changed his mind but realizes he is too late to save her and that Paige was actually rejecting the Bite. Knowing that Paige will die instead, Derek broke her spine to end her suffering. The killing of an innocent caused his werewolf eyes to change from yellow to blue, darkening his soul. Later on, Derek entered into a sexual relationship with Kate Argent, unaware she was a werewolf-hunter and was only using him to get information on the Hales. Kate burned the Hale House down, killing most of Derek's family and rendering Peter comatose. Derek and his older sister Laura left Beacon Hills for New York soon after. Due to his tragic experiences, Derek became angry, misanthropic, cynical, defensive and mistrustful.

In Season 1, Derek returns to Beacon Hills six years after the fire to investigate a mysterious Alpha who had Bitten Scott McCall and killed Laura. He attempts to train Scott to help him control his new nature. He is antagonistic towards the Argents, especially Chris, and Kate, the murderer of his family, and immediately disapproves of Scott's relationship with Allison. He does not immediately get along with Stiles, and tends to bully him, as well as Scott, into participating in his plans. In "Wolf's Bane", Derek discovers the Alpha is his uncle Peter who had murdered Laura to rise to Alpha status. In the Season 1 finale, Derek becomes the new Alpha werewolf, killing Peter to avenge Laura's death. In Season 2, Derek exhibits pride and a hunger for power. He attempts to recruit Scott into his Pack, but Scott no longer trusts him. He goes on to Bite three students, Isaac, Erica and Boyd, all with dark backgrounds, easily recruiting them to his Pack in exchange for power and confidence. He is threatened by the Kanima and sets out to kill it. As the dangers escalate, Erica and Boyd leave, frightened of the Argents' werewolf genocide. Derek grows to respect Scott more over time, treating him as more of an equal, especially after Scott puts an end to Gerard's threat and after saving each other's lives multiple times, Derek somewhat humors Stiles and comes to trust his judgment. In the finale "Master Plan", it is revealed Derek was in a hurry to build his Pack and power because an Alpha pack would be on the prowl for a development such as his rising to Alpha status.

In Season 3, the Alpha Pack led by Deucalion arrive in Beacon Hills ostensibly to recruit Derek, and are holding Boyd and Erica hostage. Derek is saddened when Erica is found dead, but is emotionally shaken when he discovers his younger sister Cora who had survived the fire is found also. When Boyd and Cora are feral under the full moon, Derek saves Jennifer Blake, the new English teacher, from them. Derek becomes attracted to Jennifer, starting a relationship with her. After discovering that Cora is alive, Derek displays a more caring, humane side of himself around her, is protective of her and actually cares about what she thinks of him. In "Currents", Derek is emotionally broken when the Alphas have him kill Boyd by accident to absorb his powers, which also causes him to see Erica's death via the former's memories. Jennifer is later revealed to be the Darach who was making Human sacrifices across Beacon Hills, and had poisoned Cora with mistletoe for leverage against him to his anger. Not caring about power anymore, Derek gives up his Alpha status to save Cora from death, helps Scott put a stop to Jennifer saving the kidnapped parents, but they decide to spare Deucalion. Derek leaves town with Cora for South America. In Season 3B, Derek is on a mission with Peter in South America to retrieve his mother Talia's claws which are in the possession of the Calavera family. He and Cora have also separated, as he had her go into hiding. They retrieve the claws with the mercenary Braeden's help. After returning to Beacon Hills, Derek has Peter use a ritual to communicate with Talia's ghost. Derek meets with Scott, tells him he was told by Talia the Hales didn't only live in Beacon Hills, they protected the town and it needs someone like Scott to continue protecting it. Derek also solves his differences with Chris after he saves Chris' life from a bomb set off by the Nogitsune, and Chris tells Derek they aren't enemies anymore right after the Nogitsune had controlled him to kill former. In the Season 3 finale, Derek and the twins face off against the Oni after bringing the triskele urn which held Talia's claws because it could be used to seal the Dark Kitsune away. Derek is last seen being cornered in his loft by the Calaveras. Suddenly the hunters are attacked, and Derek comes face to face with a revealed-to-be-alive Kate Argent.

In the Season 4 premiere, "The Dark Moon", Kate is holding Derek in Mexico, in an Aztec temple, La Iglesia. Scott's Pack and Braeden rescue him, but Kate, using the talents of Tezcatlipoca, had Derek regressed in age and memory to 15 or 16 years old, the time of his life when he was sleeping with Kate, when he trusted her. In the episode "117", Kate used him to have him reveal to her the location of the Hale vault so she could steal the Triskelion. Later on, Derek fights Kate's Berserkers, shifting to his werewolf form, and this causes him to return to his normal age, but his werewolf eye colour has returned to gold. He later realizes this means he's gradually losing his werewolf power. Derek hires Braeden to find Kate for him over her contract with the Calaveras. Braeden accepts, while simultaneously flirting with him. Derek later finds Braeden injured, taking her to the hospital. Derek and Braeden's interest in each other deepens and they start a relationship. Braeden gives Derek lessons on how to use firearms, as well as hand-to-hand combat necessary for a human against supernatural foes. He excels at her lessons, overpowering the assassins at the high school and learning how to use his new handgun while protecting Satomi's Pack. With Lydia arriving at his loft letting out a Banshee Scream, Derek contemplates the fact he may not come back alive on the mission to rescue Scott, sharing a kiss with Braeden. Derek is wounded by a Berserker and later dies. Later however, he revives with all of his powers restored and at their peak, destroying the Berserker, as well as gaining the talent to fully shapeshift into a wolf, like his mother Talia and sister Laura before him. Derek learns he was actually Evolving all throughout Season 4. Derek, now a fully Evolved werewolf, and Braeden leave Beacon Hills together.

In the beginning of Season 2, Lydia recovers, but suffers from a hallucination while in the shower and goes into a fugue state running through the woods naked for two days. Afterwards she doesn't remember the entire experience at all. Lydia is determined to be immune to the Kanima's venom, and thus Derek assumes she's the Kanima, although it is later revealed to be Jackson. Lydia suffers further fugue episodes and hallucinations which, along with Jackson's rejection, causes her to have emotional breakdowns. The hallucinations are caused by Peter, who planted memories of himself in Lydia's mind from his Bite, possessing her to use her to resurrect himself. As a result, she learns pieces of the supernatural events taking place. In the Season 2 finale, Lydia selflessly faces the Kanima and successfully coaxes the shapeshifter to transform back into Jackson, by holding up the house key Jackson had given her when they were together. When Jackson asks if she still loves him while he's dying, she responds that she does and embraces him when he is cured of being a Kanima and resurrected as a werewolf.

By Season 3, Lydia has been brought up to speed on the supernatural, has matured and come to care deeply for Scott and Stiles. She and Jackson have parted since he moved to London and she is attempting to get over it. Lydia enters into a purely physical relationship with Aiden, initially to distract herself from Jackson, unaware he was assigned to get close to her to get leverage on Scott. Lydia displays a strange connection to the events occurring in Beacon Hills being mysteriously drawn to the locations of several of the sacrifices and occupying her time with drawing the same tree over and over again. Lydia joins forces with Stiles to figure out who is really behind the sacrifices. In "The Girl Who Knew Too Much", when Cora Hale tells she, Scott and Stiles all they do is find bodies, not saving anyone, Lydia later appears at the memorial recital deciding to stop fighting her peculiar talents if it could help save someone with Scott offering his support. Later she is held captive by Jennifer Blake, the Darach, who attempts to kill her and Lydia lets out a high pitched Scream. Jennifer then reveals to Lydia that she is actually a banshee. Lydia and Stiles find out the tree she's been consistently drawing is an inversion of the Nemeton's root system, which allows them to realize it's where the kidnapped parents are being held. During Season 3B, though Lydia continues her liaison with Aiden, she eventually tells the werewolf that he is only a 'bad guy' because he helped to kill Boyd, while she uses her abilities to help save lives. Lydia's talents allow for her to communicate on a network that predicts death: Jeff Davis has revealed this network is the whispers of other banshees. The Nogitsune kidnaps Lydia in "Insatiable" and takes her to Oak Creek. She senses the pending death of the Nogitsune - only this was the reason the he took her, to know in advance when the Oni would appear to kill him, so he would be able to take control of the demons. Lydia had warned the others through a message relayed by fellow banshee Meredith Walker not to come for her, because she had sensed an impending death - Allison's. Lydia Screams for Allison when she's impaled by an Oni and is overcome with grief as she feels her best friend's death. In the Season 3 finale, Lydia meets with Deaton and Scott, and comes up with the idea to use the Hales' triskele urn to trap the Void kitsune. Shortly after the Nogitsune's defeat, she "feels" another death - this time it is Aiden. Despite her previous opinion of her lover being a "bad guy", Lydia grieves him from fighting the Oni as a "good guy".

In Season 4, Lydia has started over with new friends in Kira and Malia. Lydia helps Malia with her schoolwork by lending her notes. She learns some of the notes is actually computer code she doesn't remember transcribing. Using her banshee talents, Lydia learns the computer code comprises the Dead Pool, a hit list of supernaturals in Beacon Hills as well as the first cipher key to decode the list: ALLISON. Lydia immediately works on getting the other two cypher keys, later learning from Meredith the second is AIDEN. Lydia cracks the final third of the Dead Pool but sees that Meredith is on the list. She is saddened that Meredith has committed suicide out of fear. Lydia later learns her paternal grandmother Lorraine was also a banshee; she'd written a list of names, part of the Dead Pool code which lead her and Stiles to Eichen House. The twosome, along with Parrish, learn Lorraine was actually murdered by Brunski, that Meredith is alive and has been the Benefactor all along, and later on, Meredith's history with Peter. Meredith reveals to Lydia she'd enacted the Dead Pool after Hearing Lydia's Scream when she felt Allison's death, because of how many people have died because of the supernatural. Lydia tells Meredith "Not all monsters do monstrous things", the two banshees coming to an understanding. At the end of Season 4, Lydia gives Parrish a hard copy of the bestiary and offers him her help to learn what his supernatural species is. In Season 5, everyone is preparing for senior year. She and Parrish have also grown closer. Lydia watches over fellow senior Tracy Stewart who's actually a Kanima, and her target is Lydia's mother, Natalie. In the ensuing skirmish, Lydia is injured by the Kanima-Chimera, but implores her mom to secrecy. Tired of being defenseless, Lydia requests and takes up hand-to-hand lessons from Parrish and makes exceptional progress. Lydia, along with Stiles, discover Parrish is the one who's stealing the bodies of the deceased Chimeras, and is bringing them to the Nemeton. In "Lies of Omission", Lydia spars with Parrish to get him to "stop thinking", intending to, and successfully triggering his nature. She surmises what Parrish's doing is covering up the supernatural, protecting the secret. After a conversation with Parrish, and remembering Kira mentioning the Wild Hunt, Lydia positively identities Parrish as a hellhound. She suddenly predicts Scott's upcoming death in the library, but Theo knocks her out and kidnaps her before she can tell anyone. Theo then performs a mind-meld on her so he can find the Nemeton. Lydia is left driven out of her mind from the process.

In Season 5B, Lydia is rendered catatonic from Theo's clawing into her memories. Her mother Natalie has Lydia transferred to Eichen House which has been taken over by an escaped Valack in disguise. In "Damnatio Memoriae", Lydia separates from her physical body, then communicates with Meredith through telepathy. The fellow banshee tells her she has to wake up to save her friends who are in danger and promises to teach her how to use her voice as a weapon. Under Meredith's coaching, while simultaneously sensing the death in Beacon Hills due to the "the Beast" and predicting Malia's death at the hands of the Desert Wolf, Lydia succeeds in using her voice: she snaps awake from her coma, Screaming and inconspicuously saving Malia's life. With her new skill, she makes an attempt to escape to protect her friends, but Valack, glamoured as Aiden distracts her and she's restrained. Valack then performs a trephanation on her, to her distress and trauma. Valack tells Lydia he's amplified her abilities and uses her to learn more of the Dread Doctors and Theo. The reunited Pack hatches a plan break her out of Eichen House.

Teen Wolf: The Hunt, a Teen Wolf–inspired social network game, states that Lydia was born on March 23. She likes Mu Alpha Theta, figure skating, yoga, and astrophysics, and is a fan of Madonna, Calvin Harris, Kids of 88, Muse, and Kat Graham.

Colton Haynes

Jackson Whittemore is the-captain of the Beacon Hills lacrosse team and the captain of the school's swim team. Jackson's birth parents were Gordon and Margaret Miller. They died in a car crash on June 14, 1995, but Margaret was kept on life support long enough for the doctors to deliver Jackson by c-section into the middle of the night as his birthday is June 15th. He was adopted by attorney David Whittemore and his wife. In compensation for their deaths, Jackson is to receive a large insurance settlement on his eighteenth birthday.

Jackson is the big man on campus at Beacon Hills High, and has a competitive, self-absorbed and aggressive nature, which shows through hostility towards people who best him. Jackson wishes to make others proud of him, this desire to always live up to people's expectations appears to stem from his insecurity about his adoption and the fact that he does not know his real parents, leading him to be unable to see his adoptive parents as his true mom and dad. Despite his abrasive character, he is shown to care for his friends and dislikes hurting them. It turns out he is genuine friends with Danny Mahealani and he actually cares more for Lydia Martin than he lets on, though he'd never admit it. During Season 1, Jackson is angered, suspicious by Scott's sudden, seemingly impossible improvement on the lacrosse field and other activities repeatedly besting him, which impacts his psyche. Consequently, he investigates Scott, eventually coming in contact with Derek Hale and being accidentally scratched by Derek in "Magic Bullet" (who was poisoned with wolfs bane at the time and partially passes the poisoning onto Jackson through the claws), witnessing the Alpha werewolf in "Night School". He eventually discovers Scott is a werewolf. He threatens to expose Scott unless he helps him become one too. The Argents grew suspicious of Jackson. At the school formal he gets drunk and exposes Scott's werewolf nature to them. In the Season 1 finale, "Code Breaker", he regretted turning Scott over to the Argents, and helps Scott, Allison and Stiles defeat the Alpha werewolf, Peter Hale. Later Jackson appears the Hale house demanding the Bite from Derek because he helped him.

In the Season 2 premiere "Omega", it's revealed Derek had Bitten Jackson, which he takes with absolute smugness. However, Derek notices his body is rejecting the transformation, causing black blood to bleed out of his orifices. In the fifth episode of Season 2 "Venomous" it is revealed Jackson instead became a Kanima, a murderous reptilian shapeshifter that is a weapon of vengeance. Jackson, as the Kanima, commits numerous murders throughout Season 2. Jackson does not know that he is the Kanima, nor does the Kanima side of him know that it is Jackson. In his Kanima form, Jackson was nigh unstoppable: he had enhanced strength and agility that far exceeded the werewolves, even Derek, the Alpha werewolf, the Kanima could heal from being shot by Chris repeatedly, Derek slashing its throat, and Allison putting an arrow in its head and stabbing it in the chest. The Kanima's claws also produced a paralytic poison that could completely immobilize a victim by the Kanima slashing the back of the neck and it could scale walls. The Kanima seeks a Master who wishes to exact revenge on others to control the shapeshifter and the Kanima carries out whatever vengeance the Master bids, revealing that as the Kanima, Jackson's every move is controlled by someone else. In the episode "Fury", it's revealed Jackson came across an unstable, traumatized student, Matt Daehler who became his Master. Matt had the Kanima murder former Beacon Hills High students who almost caused him to drown when he was a little boy during a drunken pool party. After Gerard Argent kills Matt, he becomes Jackson's new Master. It is revealed that Jackson became the Kanima because he is an orphan, exemplified by his outward behavior and personality, meaning he lacks an identity. He can be saved by a person with whom he shared a true bond; in Jackson's case, this person is Lydia. Through Lydia's selflessness in the Season 2 finale, "Master Plan", the Kanima reverts to Jackson. Aware of what he is, Jackson then allows Derek and Peter Hale to kill him. Dying, he asks Lydia does she still love him, she responds that she does. Jackson returned to life and finally becomes a werewolf, however, with blue eyes rather than the common yellow. His eyes as a werewolf are blue, because as the Kanima he took innocent lives (regardless of his intent); Derek, Peter, and the twins Ethan and Aiden share this feature.

In the Season 3 premiere, Lydia revealed that Jackson was trained by Derek to control his werewolf nature. Later he and Lydia parted and his father moved him to London.

"Teen Wolf: The Hunt", a Teen Wolf inspired social network game, states that Jackson was born on June 15. He likes Porsche, Golden State Warriors, USC Trojans, and the San Jose Sharks, and is a fan of Wiz Khalifa, Nicki Minaj, Drake, and Gym Class Heroes.

Shelley Hennig

Malia Tate is a werecoyote, a member of Scott's Pack, the adoptive daughter of Henry Tate and his late wife Evelyn, and the love interest of Stiles starting in Season 3B. She also has an unnamed deceased younger adoptive sister. In "Letharia Vulpina", however it's revealed Peter Hale is Malia's biological father. Malia's birth mother is an assassin Corrine known as the Desert Wolf.

At age 9, Malia was presumed dead for eight years from a car accident that claimed the lives of her mother and her younger sister. She was actually alive, fully transformed as a coyote. On the night of the car crash Malia had shapeshifted on a full moon. Her shift had supposedly caused the accident, and killed her mom and sister in the process earning her blue eyes by taking innocent lives. In the Season 3B premiere "Anchors", Sheriff Stilinski reopens the case under a suspicion a supernatural may have been involved, and Scott and Stiles discover Malia in the woods. In the episode "More Bad Than Good", Scott uses his Alpha roar to have Malia return to human form. Sheriff Stilinski and Stiles bring her home and she is reunited with Henry. After eight years as a coyote in the wild, Malia is very in touch with her animal side, is rather brash, quick to fight, and tends to speak her mind. She initially struggles academically and shows little regard for social etiquette. As the series progress, Malia readjusts to her humanity.

In "Echo House", Malia is interned at Eichen House sanatorium. There, she sees Stiles who has voluntarily committed himself. When he walks up to Malia, she attacks him aggressively. Malia tells Stiles she is unhappy as a human, because she now lives back with her father and can't tell him that she killed her mom and sister, and Scott's Alpha roar has caused her to remain human and unable to fully transform again. Stiles, who needs access to the basement for information regarding the Nogitsune's connection to Eichen House, specifically the kanji "self" on the wall, makes a deal with her: she helps him get into the basement, then Scott will teach her how to change back. Very soon afterward, they sleep together. Behind a wall in Eichen House, they find the Nogitsune's original host's body, a sheathed katana, and a photo. Afterwards, they are attacked by Oliver, Stiles' roommate, who is being controlled by the Nogitsune. Stiles lets the Nogitsune back in, in exchange for the Kitsune sparing Malia. Malia later prepares to leave Eichen House, intending to rescue Stiles. She eventually brings the sheathed sword and the photo to Scott. At the end of Season 3, Malia has started to learn to live as a human, enrolling at Beacon Hills High School and joining Scott's Pack.

In Season 4, Malia is continuing her romance with Stiles, with the Pack attempting to help her reintegrate back into society. Malia has a survival-of-the-fittest mentality, as shown when she was willing to leave Lydia behind when the Pack was held captive by the Calaveras. She regularly sneaks into Stiles' house at night. Malia is struggling in learning control during the full moon. In "The Benefactor", Stiles stays with her on the full moon while she is partially transformed; he surmises she lacks control because of her guilt in what she did to her mother and sister. He relates to her because of the Nogitsune's possession of him. Malia perfects control at this. The Pack keeps Malia in the dark that Peter Hale is her biological father, to protect her from the sociopathic werewolf. But in "Weaponized" Malia discovers the truth when she sees she is listed on the Dead Pool as "Malia Hale". Malia is severely hurt and feels betrayed by Stiles keeping the information from her, straining her relationship with him. Malia meets with Peter, learning from him her real mother is known as 'the Desert Wolf'. Malia doesn't see herself different from Peter, he being a killer while she killed her adoptive mother and sister. In "Monstrous" after being almost killed and learning of Stiles' own near-death experience, Malia, with a push from Melissa, ultimately makes up with him, and at the Martin lakehouse they locate the computer servers that house the Dead Pool, and shut them down. On the mission to rescue Scott and Kira, Peter tries to coax Malia into unleashing her animal side in the fight against Kate and the Berserkers, but Malia sees Peter for the monster he is upon learning he was intending to kill Scott. Malia is pleased Stiles is looking into her biological mother.

In Season 5, Malia has settled back into her relationship with her dad Henry, has become more connected with her humanity and receives her summer school results allowing her to be a senior with the others. In "Dreamcatcher", Malia receives a photo of a carnage caused by the Desert Wolf from Braeden through Stiles. Malia is content in just "putting Tracy Stewart down" after her out-of-control murder spree. After Scott's encouraging and urging to save Tracy instead, with the latter at her mercy, Malia goes through with it, and just then, Tracy is euthanized by the Dread Doctors to her horror, and as the Chimeras are killed off, it takes its toll on her. In "A Novel Approach", while on a driving lesson with Theo, after reading Valack's novel, Malia remembers more of the crash that ended in her family's death: it was not her full-moon transformation, but a woman that opened gunfire on the car that caused it to go off the road in the first place. She impulsively confides in Theo said woman was the Desert Wolf. Unable to deal with it, Malia tells no one else. Malia notices Stiles' obvious lies, and starts to lose trust in him. She also notes Theo's keeping silence, but grows to trust him. In "Lies of Omission", Malia fails to save another Chimera. The recent trauma and chaos having left its mark, Malia states she can't follow Scott's rules on protecting innocents anymore. In "Status Asthmaticus", Malia reveals she knew about Stiles' killing Donovan, but it didn't matter to her. Nonetheless, her relationship with him has ended. Malia secretly makes the decision to kill the Desert Wolf in vengeance for her family. Theo offers Malia his aid in her decision, unaware because he is revealed to actually be a werewolf/werecoyote Chimera, hence her being drawn to him, before his treachery is revealed.

In Season 5B, when Braeden returns, Malia learns the Desert Wolf is coming back to Beacon Hills for her. Because of this and not wanting to put her friends in danger, Malia leaves Scott's Pack saying she can't help him. She and Braeden prepare for her mother's arrival, but learns she has taken Deaton hostage. In "The Sword and the Spirit", despite her best efforts, Theo seduces her to help the two find Deaton and the Desert Wolf. He betrays them at the last minute as he'd made a deal with the assassin. Malia faces off against her mother (Corrine) in vengeance for having Malia kill her family, but the Beast intercepts. Malia chooses to save Deaton and Braeden over killing her mother which gives her the resolve to rejoin the Pack.

Kira Yukimura is a kitsune, the daughter of Noshiko Yukimura and Ken Yukimura, and Scott's second love interest. In Season 3B, Kira is the new girl at school, having moved to Beacon Hills from New York. Kira is initially portrayed as sweet, intelligent, but socially awkward. After being brought into the supernatural, learning of her own as well as her family's secrets, she shows a defined sense of ethics, protection, a growing sense of confidence, and camaraderie joining Scott's Pack. As a Kitsune, Kira is of the type Thunder: she has power over electricity, and she naturally wields a katana sword as a "gateway" for her Fox Spirit.

At Season 3B's start, "Anchors", Kira looks to make friends in school, but is embarrassed because of her dad Ken being the new history teacher who's prone to unintentionally embarrassing her. Kira displays a crush on Scott, which he reciprocates. In "Galvanize", Kira is revealed to be supernatural after mass murderer William Barrow kidnaps her, but once he attempts to kill her using electrocution, she manifests an ability to absorb electricity after he attempts to kill her. Scott witnesses this display and Kira is intrigued that Scott doesn't "run the other way" from her peculiar circumstances. In "Illuminated", it is shown that Kira gives off an aura that is shaped around her like a flaring armor in the shape of an bipedal fox. Scott invites her to Danny's black light party and their interest in each other strengthens and later, she witnesses Scott and Derek Hale fight the Oni in their werewolf forms. Consequently, Scott reveals the supernatural status of he, his Pack, and everything else to her, to her elation. Kira eventually does research and theorizes she is a Kitsune, the Fox trickster, which is later confirmed by Derek. Kira discovers further abilities; super speed and a natural talent for swordplay. When her mother Noshiko displays similar talents, she discovers, to her shock Noshiko is also a Kitsune and who summoned the Oni to Beacon Hills. In "The Fox and the Wolf", Kira confronts her parents, along with Scott. Kira is distrustful of her mom and is further baffled when Noshiko reveals she is actually 900 years old. Noshiko tells Kira her story of her time as an intern at Camp Oak Creek and her role in unleashing the Nogitsune. Noshiko asks Kira to trust her this once, telling her she is a Thunder kitsune, and shows her how to use her FoxFire to repair her shattered katana. Kira is told Noshiko's legacy is now hers when she passes her the sword. Kira comes to grips with her Kitsune nature, wanting to help save Stiles.

In "De-Void", still unable to face her parents after everything they've kept from her, Kira spends the night with Scott, she shares a kiss with him. In "Insatiable", Kira along with Isaac and Allison go up against Noshiko and the Oni trying to dissuade her mother from outright killing the Nogitsune as the process could potentially kill Stiles. Unfortunately, the Nogitsune takes control of the Oni and turns the demons against them and Allison is killed. In the Season 3 finale, Kira is told by Ken and Noshiko their move at this point has to be a divine move in order to stop the Nogitsune. Kira goes along with Scott, Stiles and Lydia to stop the Nogitsune at the school. She battles the Oni and then fatally stabs the Nogitsune running the demon's corporeal form through with the katana after Scott Bites him. In Season 4, Kira has her romance with Scott on hold because she wants to give Scott the time he needs to grieve for Allison. Kira has also become completely integrated with the Pack, becoming close friends with Lydia and Malia, wanting to use her abilities to protect people in Beacon Hills. In "Muted", Scott decides to give in to his feelings for Kira, sharing a deep kiss with her, to her joy. Scott and Kira finally go on their first date. They are attacked by Kate Argent and her Berserker and are taken to La Iglesia. Kate has Scott converted into a new Berserker, and under the malevolent werejaguar's control, Kira is attacked by Scott. Hallucinating her mother and determined to save Scott, Kira breaks off a piece of obsidian in the temple and uses it to trigger her kitsune healing. She saves Scott when, as per Peter Hale and Kate's plan, he's almost destroyed as a Berserker. Kira keeps the obsidian shard when returning to Beacon Hills. Afterward, Ken has the shard reshaped into a shuriken and Noshiko presents her with the star, and Kira realizes the shuriken is her first Kitsune Tail.

In Season 5A, Kira, after a summer with her parents in New York, starts senior year with her friends, including she and Scott consummating their relationship. In "Dreamcatcher", up against the Chimera Tracy Stewart, Kira takes Tracy on, and displays an Evolution: her Kitsune aura erupts around her frame and becomes naturally visible. Second time around, she starts to lose control, attempting to behead another hybrid shouting "Watashi wa shi no shisha da!", though Scott stops her. Her Kitsune aura also becomes independent which Scott witnesses when he views the Fox spirit, though he keeps quiet about it. Kira is flabbergasted when Scott tells her he loves her under the impression he doesn't realize he did, but is lighthearted upon hearing he remembers, and that he meant it. After the debacle at Eichen House, Kira starts to feel she's causing problems, when she can't read or finish Valack's novel, due to her Fox being affected by it, and later when she almost kills her mother in a rage. In "Ouroboros", Kira goes into a trance leading to route 115. She learns, to her horror her sword was found impaled in the body of a Chimera, but she can't remember. Noshiko gives Kira instructions for to allow her Fox Spirit to read the novel and Kira remembers the Dread Doctors experimented on her during the storm on route 115, amplifying her Kitsune status and power, that they're responsible for her Evolution. She and her parents decide they have to leave so they can tame her Fox spirit. Kira has Scott tell her the truth about her Fox Spirit; he does. She shares a kiss goodbye with him and leaves Beacon Hills.

In Season 5B, Kira and her mother have traveled to Shiprock, New Mexico to find a solution for to control her Fox Spirit. They come into conflict with local skinwalkers, supernaturals skilled in magic. Kira is put through a test by the skinwalkers, facing off against an Oni. Her Fox Spirit takes control and destroys the demon. Though she wields the sword, her Fox wields her: Kira is now condemned by the skin-walkers to stay and become one herself. Scott appears in time to rescue her and they escape. Overjoyed, Kira tells a light-hearted Scott she loves him. In "The Sword and the Spirit", Kira is instructed by her father Ken to use her mind as a weapon instead of the sword and she'll "outfox the Fox" as a new solution to control the Spirit.

Dylan Sprayberry

Liam Dunbar is a new freshman at Beacon Hills High School in Season 4, Mason's best friend and a Beta werewolf in Scott's Pack. Liam is loyal, extroverted, sometimes cocky, but has severe anger issues. Liam lives with his mother, and step-father Dr. Geyer. In sixth grade, Liam had gone into one of his rages, injuring Hayden Romero's face on the day yearbook photos were taken, earning him her enmity. Liam transferred to Beacon Hills High after being kicked out of Devonford Prep because he'd vandalized his lacrosse coach's car. Over the series, Liam's rage problems mostly diminish, with his wanting to atone for his actions, being exchanged for a more emotionally responsible and dutiful personality. Liam is Scott's first true Beta.

Liam first appears in "Muted", excelling at lacrosse practice, but is accidentally injured by Scott. Scott immediately helps bring him to the hospital. Liam comes into the supernatural world when he's held hostage by Sean Walcott, a wendigo. Scott attempts to rescue him, but Liam is thrown over the hospital roof. Sean has Scott's arms pinned, so to save Liam from falling to his death, Scott catches Liam with his fangs, Biting him, transforming Liam into his first Beta. In the next episode "The Benefactor", Liam's werewolf abilities begin to manifest. At Lydia's lake house, Scott's Pack meets with Liam; they attempt to gain his trust and debrief him of their supernatural status. Liam angrily snaps at them, losing control, fully transforming and running out into the Preserve. Scott and Chris Argent effectively subdue him. Terror-stricken at what's happened to him, Liam tearfully admits he deserved getting kicked out of his old school. He fears his parents seeing him as a monster. Scott tells Liam: "You're not a monster. You're a werewolf. Like me." Afterwards, Liam is brought into the Pack, Scott begins teaching him control, everything supernatural and keeping him safe.

In "I.E.D.", Liam faces off against his old school rival Brett Talbot during the lacrosse season's pre-season scrimmage. Scott and Stiles keep Liam under control during the game, but they learn that their teammate Garrett is an assassin, and is targeting Brett who's also a Beta werewolf. Liam is then kidnapped by Garrett, and dying of a wolfsbane laced wound. Liam remembers Scott's training on being a werewolf which gives him enough control over his werewolf side to let out a howl which allows Scott to find and rescue him. Liam eventually develops enough control outside of the full moon. In "Time of Death", during the plan of catching Scott tells him he doesn't have to get involved in the plan of catching the Benefactor if he doesn't want to. Liam decides he's not afraid and wants to help. Liam and Kira take on a Berserker, but they're overpowered. Liam develops PTSD afterward, having hallucinations of the demons. Later on with his price on the Dead Pool being spiked and the attempted assassination at the bonfire, the stress starts to get to him. Liam admits his fears to Scott, saying he's not like his Alpha, how he and the others put their lives on the line, to save livs. In "A Promise of the Dead", Liam struggles, but he is helped by Brett, with his former rival roughing him, snapping him out of his phobia, telling him he is alive. Brett then explains he's lucky to have Scott as his Alpha, because Scott is a True Alpha, meaning he earned his status. Liam is inspired upon hearing this, fully overcoming his fears. In "Smoke & Mirrors", it's the full moon, but Liam insists on coming to save Scott. Liam manages to exert control when Stiles has him recite Satomi's mantra. When Scott is under the Berserker spell, Liam reaches Scott using Scott's same words: "You're not a monster. You're a werewolf. Like me", which breaks the Berserker spell, and sees Scott put away Peter after the murderous werewolf threatens him.

In Season 5A, Liam is still learning to master control. In "Parasomnia", he learns, to his chagrin, his grade-school familiar Hayden has enrolled in school. The Pack has given him permission to let Mason in on the supernatural. Though worried that Mason, his best friend, would reject him, Liam attempts to do so. However, a full wolf (Theo) chases him and Mason, forcing Liam to expose himself to Mason, but the latter is instead completely beside himself with thrill. When the Chimeras appear, Liam tracks one at the club Sinema where Hayden works in "Condition Terminal", but he causes her to drop the shots she was carrying, to her ire. He later attempts to pay her back. Hayden coldly rebukes him. Liam, however insists on making up for the shots, even more so when he learns the money is for her medication. Their relationship overtime begins to improve, with the two starting to fall for each other. Liam later discovers Hayden is a Chimera. He manages to convince her of the supernatural, and brings her to Scott's Pack in "Strange Frequencies" to protect her. Liam is furious, disgusted by Scott's decision to use Hayden as bait, but has Scott promise him he'll do everything he can to save Hayden. Despite the Pack's efforts, the Dread Doctors abduct both Liam and Hayden, and while held captive, they become closer. Upon being rescued by Theo, Liam shares a kiss with Hayden, while also activating his pain siphoning. After this, he and Hayden form a romantic relationship, becoming lost in their own world. After Hayden is poisoned by the Dread Doctors in "Lies of Omission", Liam, overcome with worry, is tricked by Theo into thinking the Bite will save her. Scott says no, reasoning the Bite could actually kill her. In "Status Asthmaticus", Scott's refusal and the upcoming supermoon greatly affecting his temper, Liam is led by Theo to violently clash with Scott who's been drugged by the former with wolfsbane. Liam comes close to killing Scott. Mason arrives and snaps Liam out of his rage. Mason tells him of Hayden's death. Devastated, Liam gives Hayden a final kiss, before she is taken by Parrish.

In "The Last Chimera", Liam is mulling over his misplaced, misguided actions, wracked with guilt for almost killing Scott and leaving Hayden for dead. He is however shaken when he discovers Hayden is actually alive, brought back to life by Theo. Liam and a frosty Hayden confront each other over his leaving her to die to kill Scott, and she being in Theo's Pack while Theo manipulated Liam to kill Scott, and killed Scott himself. In "Codominance", the two make up after Hayden states she can't die again for her sister's sake and Liam agrees and kiss. In "The Sword and the Spirit", Liam attempts to locate the Dread Doctors' lair. Liam professes to Scott he did something really wrong by trying to kill him and says he has to make things right for what he did, like he'd have to save Scott's life. Scott remains distant but reassures Liam Hayden is alive and maybe he'll get a chance.

In "Formality", Melissa helps Scott get ready for the school formal and tells him "Women love words", giving her son the confidence he needs to tell Allison both he loves her, and that he's a werewolf. In Season 2, "Abomination", Melissa's life is inconspicuously threatened by Gerard Argent to blackmail Scott into following his orders. Scott complies, though Melissa notices his distress right afterward. Scott lies to her, saying everything's fine. In "Restraint" after Jackson files a restraining order against Scott and Stiles, Melissa angrily confronts Scott over all of his bizarre behavior. She concernedly asks are his actions because of his absent father. To keep her in the dark, Scott affirms this. In "Fury", Melissa is called to the sheriff's station as a witness, but as she arrives she sees Matt Daehler shoot Scott in the stomach and is horrified. Melissa is held hostage with Stilinski. Melissa comes into contact with the supernatural, witnessing a shapeshifted Derek Hale fight the Kanima, and finally sees Scott as a werewolf. At first, she is horrified, devastated, having trouble coping. She avoids Scott for a week and is even more frightened when Gerard breaks into the house and has the Kanima hold her hostage. Eventually, Melissa comes to accept Scott for his new identity, and encourages him to help others with his abilities.

In Season 3, Melissa is closer to Scott having come to terms with his world, assisting him whenever possible, attempting to smuggle Isaac out when he's committed to the hospital and helping Stiles identify a new killer in Beacon Hills by allowing him access to the morgue. In the episode, "The Overlooked", during the evacuation of the hospital because of a storm, Melissa finds Ethan and Aiden in their merged form attacking Scott. She saves her son by electrocuting them with a defibrillator. She helps Scott the others with their plan to help Jennifer, the Darach, escape the Alphas (Jennifer had poisoned Cora and kidnapped Stilinski for leverage), but Jennifer double-crosses them and kidnaps Melissa. Melissa is later held in the Nemeton along with Stiles' and, later, Allison's fathers for the final sacrifice, Guardians. In "Lunar Ellipse", she and the other parents are rescued by Isaac, Allison and Stiles. Like Scott she is not happy with her ex-husband, Rafael back in town. In "Anchors", Melissa, along with Scott, is angry when Rafael conducts a case for impeachment in his attempt to fire Sheriff Stilinski. Right afterward she realizes Scott is about to lose control of his wolf side. More used to the supernatural, she helps him regain control by telling tell him to "be his own anchor", as Allison was his anchor and they've parted which Scott manages to do. After that she comforts and promises him that people fall in love more than once. Melissa has also had the McCall residence installed with ash wood base boards with Deaton's help to work as wards against supernatural intruders which she arms when the Oni attack the house. Mellisa, Stilinski and Scott's issues with Rafael are revealed in "Insatiable": when they were married, Rafael used to be a heavy drinker. One time, when Scott was only a toddler, Rafael came home drunk and had accidentally knocked Scott down the stairs bruising his head on the floor and she'd kicked Rafael out. Stilinski had answered the domestic distress call, exacerbating spite from Rafael. In the Season 3 finale, the hospital is attacked by the Oni, and Melissa makes Rafael promise her, if she doesn't make it, he is to make things up with Scott. Melissa is saved when the Nogitsune is defeated. Melissa comforts her son when he finally has time to mourn Allison's death.

During Season 4, because of all the antecedent damage done to the hospital, Melissa is late in paying her bills for the house, forcing her in having to make double shifts at the hospital. She calculates the cost of the budget to learn how long before she and Scott could lose their house. Scott, worried for Melissa, hides the duffel bag full of Dead Pool money, paid to the assassin Garrett, in his room, hoping it could solve their financial crunch. In "Time of Death", Melissa takes part in Scott's plan to have Scott fake his death to catch the Benefactor. She hates the plan when told Scott will die for real if Kira doesn't shock him again within the next 45 minutes. Melissa snaps at Noshiko asking why are they letting their kids handle these dangers. Noshiko answers that they'd be asking them to "run and hide for the rest of their lives" otherwise. Melissa finds the Dead Pool money in "A Promise to the Dead", and confronts Scott, saying while he can "save lives", he can't save people "from life", convincing her son to return the money to the Hales. In Season 4, "Condition Terminal", Melissa calls Scott to the hospital where a patient named Corey is in relentless pain so Scott can siphon the pain. Scott and Melissa store the Chimera Lucas' corpse in the morgue after the Dread Doctors kill him. Scott mulls that he "should have done something". Melissa says his grandfather had a saying; when one says "I should have" too much, then "You're should-ing all over yourself." She says she wishes she could be the mother to say Scott can't be involved in the danger of Beacon Hills because he's always going to be at the center of it all, and because he cares. She asks him the foremost question: what is he going to do. Scott replies he'll find out whoever murdered Lucas and stop them. In "Ouroboros", when Stilinski sticks to the law putting out an APB on Kira when her sword is found in the body of a dead Chimera in spite of the world they live in, Melissa slaps him in the face for it, coldly telling him, "Maybe you should learn to bend a little, before some else breaks." In "Status Asthmaticus", after Scott is killed by Theo Raeken, Melissa persistently applies CPR. She screams for her son to roar to bring himself back: it works and Scott is revived, roaring. Melissa treats and comforts her defeated son. Melissa tells Scott his friends will come back to him, and advises him to bring and give everyone and his Pack hope.

In "The Last Chimera", Melissa comforts a distraught Stiles over Stilinski's injuries and attempts to help Dr. Geyer keep Stilinski from dying. She learns from Stiles the Sheriff's being poisoned from bone marrow. She manages to convince Geyer to perform surgery: it works and successfully saves Stilinski' life.

In Season 1, "Co-Captain", Stilinski links the murders committed by the Alpha to the Hale House fire. He discovers an accomplice in the arson, Adrian Harris, who gave him the lead to the culprit, a pendant. In the Season 1 finale, Stilinski finds the body of Kate Argent with the necklace, linking her to the crimes. In Season 2, the Sheriff is again working on solving a killing spree. He is put on temporary leave because of Stiles' behavior throughout the season, straining his relationship with his son. With Stiles' help, he finds out the victims were part of the Beacon Hills High swim team in 2006. He is held hostage at the Sheriff's station with Melissa and their sons by Matt, when they uncover evidence convicting Matt. After the events are resolved and Matt's death, he is reinstated as Sheriff.

In Season 3, Stilinski has a murder spree on his hands, this time committed by the Darach. Stiles is reluctant to let his father in on the supernatural loop out of fear he could be killed. Eventually in the episode "The Girl Who Knew Too Much", he attempts to tell Stilinski the truth using previous seemingly inexplicable incidents, but Stilinski says he doesn't know what he's seen, harshly trying to end the argument. Stiles talks back, saying, "Mom would've believed me." Stilinski later uncovers information on a hunch about the supernatural and discovers Jennifer Blake about to kill Lydia. He witnesses Jennifer removing her glamour talent to reveal her actual face, the Darach, and Scott in his werewolf shape. Jennifer abducts him for the Guardians' sacrifice. He is held in the Nemeton along with Melissa McCall and Chris Argent. He is now brought up to speed. In "Alpha Pact", Stilinski relays a story eight years ago when Claudia was on her deathbed. He was helping a girl who was caught in a car accident. He was holding the girl's hand and her grip tightened. She'd comforted him saying if his wife was dying, he should leave and go be with her. Ultimately, he didn't, waiting for paramedics to arrive instead. Claudia had already died when he arrived and Stiles had been with her. If he'd believed in the supernatural, believed that the girl psychically knew that Claudia was dying, he would've been with his wife in her final moments. He and the parents are rescued by Allison and Isaac just as Jennifer is using the storm to bury them. Stiles arrives holding up the ceiling of the root cellar with an aluminum bat and is reunited with his son.

Finally brought into the supernatural circle, and subsequently closer to Stiles, Stilinski starts to search through old cases which he suspect could involve a supernatural creature, particularly the case of Malia Tate. He asks Scott to help him to find some clue in Malia's house, but this proves unsuccessful. Later, Stiles admits to Scott this action was his last attempt to solve some case when he's still the sheriff, since Rafael, Scott's father is having Stilinski impeached for a "lack of resolution and ability to close cases". However, with Scott and Stiles' help in the following episode "More Bad than Good", Malia Tate is found alive and he reunites her with her father and Stilinski closes the case. Stilinski temporarily puts his dislike of Rafael aside in "Riddled" when Rafael finds Stiles after he goes missing and shakes his hand in gratitude. Stilinski has been taking notes of Stiles' growing symptoms and has him undergo a test for the same disease that killed Claudia. When he sees a brain scan similar to his wife's, he is visibly shaken.^[8] However, later, Scott reveals to Stilinski Stiles is possessed by the dark trickster, the Nogitsune. Displaying belief in the supernatural, Stilinski clues in on the fact that the Kitsune is a trickster. He learns Stiles' MRI results are fake: they are virtually similar to his wife's results, courtesy of the Void kitsune. He recalls his time in the army; he was taught that to defeat a foe, "you take away their hope". Rafael helps to talk Stilinski out of the impeachment case, saving his career and admits he only needed a reason to stay in Beacon Hills so he could make things up with Scott. Stilinski attempts to give Rafael some sound advice: that he reveal to Scott why he left. In "Insatiable", when he sees the Nogitsune has been exorcised from his son, he gives Stiles a tight hug. In Season 4, Stilinski investigates the murders by the assassin, 'the Mute'. With Derek in tow, he is lead to the school, where a Claymore mine is set up, but the assassin shows up. Derek and Stilinski overpower him, then Stilinski attempts to arrest him, but the assassin is killed by Peter. The Sheriff learns of the Dead Pool from Scott and Stiles; he has the hit list run through recognition to find the intended targets. Stilinski and Stiles are having money problems, trying to pay for the MRI and the "visit" to Eichen House which are both long overdue. Stiles is tempted to use the Dead Pool money Scott found to help solve the problems. Later on however, because Stiles was almost murdered by Brunski, their Eichen House bill is dropped as a gesture of apology. In the Season 4 finale, "Smoke and Mirrors", Stilinski saves Lydia and Mason from a Berserker using the Mute's Claymore, destroying the demon.

In Season 5, Stilinski is constantly given death threats from delinquent Donovan Donati for his history with Donovan's father. Stiles notes the Sheriff has taken off his wedding ring. In "Condition Terminal", Stilinski is against moving Tracy's shapeshifted corpse from a crime scene. Alan counters he'd be holding a press conference announcing the existence of the supernatural. Stilinski stammers, with a growing frustration over having to obscure supernatural aspects in his cases, saying "There is a line we have to draw", but reluctantly acquiesces. Stilinski notices Stiles' uncharacteristic silence and withdrawal upon realizing Donovan is a Chimera. In "Strange Frequencies", he and Melissa uncover that all the known Chimeras had previous organ transplants from an unknown donor: they were all genetically chimeras beforehand. In "Ouroboros", when another unnamed Chimera is found dead, impaled upon Kira's sword, Stilinski culminates by resolutely reporting it with an APB out on Kira to the protest of Melissa, Stiles and Kira's parents. He argues that the girl's death is murder and it's his job to investigate within the parameters of the law and while his son along with Scott's Pack combat threats outside the law, they're not above it. Melissa sharply tells him maybe he should learn to bend a little before someone else breaks. In "Status Asthmaticus", Stilinski uncovers clues surrounding Donovan's death, but he's attacked then left to die by the treacherous Theo. Stiles, horrified, manages to find Stilinski and the latter is hospitalized. Scott, Stiles and Malia uncover he'd been slashed, poisoned by Noah Patrick, a Berserker Chimera. The bone marrow poisoning him is removed by Dr. Geyer and he recovers, waking up and reassuring Stiles he "still has (him)".

In "Damnatio Memoriae", Stilinski talks to Stiles about Donovan's death. He reassures his son that his only crime was surviving, but his heart is telling him it was murder. He admits he made a mistake arresting Kira and says he's learning "to bend". He encourages Stiles to reconcile with Scott, saying he'll feel better by forgiving someone if not himself.

In Seasons 1, Chris is antagonistic towards Derek Hale, and is suspicious towards Scott due to his being Allison's boyfriend. Chris eventually learns Scott is another Beta werewolf, but later that Kate has revealed their secret life to Allison, to his fury. Chris locates Stiles and Jackson for Scott's whereabouts but the former tells him Kate orchestrated the Hale fire. He then confronts Kate about the fire and fires a warning shot to have her take her gun off of Scott. In Season 2, after Kate and Peter's deaths, he forces Allison to end her relationship with Scott (holding Scott non-lethally at gunpoint to prove his point). His father, Gerard then arrives afterward to declare war, despite his protests. Chris begins Allison's training to be a hunter but grudgingly keeps Scott safe for her sake. Chris confronts Allison over her knowledge of the murders committed by the Kanima explaining to her that because they know of the supernatural, it is the hunters' role to protect humanity from them. When Victoria is Bitten, Chris is conflicted over it while Gerard endorses her suicide and Victoria ultimately decides to go through with it to obey the Hunter's Code. She asks Chris to help her commit suicide when she can't do it alone, to his devastation and remorse, and tries to comfort Allison upon her learning the news. In "Fury", Chris is reluctant to let Allison take charge of the family. He eventually follows her lead but becomes upset, horrified when she falls under Gerard's influence. After she almost murders Erica and Boyd out of rage, Chris saves their lives, horrified by the person she's becoming. In realizing what Gerard is in "Master Plan", Chris defects, sets Erica and Boyd free and allies with Scott and Derek putting aside their differences to stop Gerard. When Gerard comes out with his plan that his objective all along was to receive the Bite to cure his cancer, having the Kanima threaten Allison's life to this end, Chris is incensed at Gerard's betrayal after he'd pushed for Victoria's suicide all while what he was planning to do, and now threatening Allison's life, branding his father a monster. After Scott puts an end to Gerard, Chris now has a newfound respect for him, and comforts a devastated Allison after everything that's happened.

In Season 3A, Chris and Allison have retired from hunting to stay out of supernatural affairs. In "Fireflies", Scott goes to him for help in stopping Cora and Boyd when they are under the influence of the full moon. Chris initially refuses saying Scott's world "decimated his". After seeing a supposed victim of their rampage, he relents assisting Scott, Derek, and Isaac, in finding and capturing them. Despite saying that he has retired, Chris starts getting involved with the Alpha Pack situation in "Motel California" and is revealed to have been hunting the Darach for some time and knows also about Allison's continued involvement. He has also grown more supportive and compromising with Allison's relationships with her friends. When Jennifer names him as the final sacrifice, Chris hands himself over to keep his daughter safe and is kidnapped by her. He is held in the Nemeton along with Scott's mother and Stiles's father, all three being Guardians of their children for the final sacrifice. Chris and the other parents are eventually rescued by his daughter, Isaac and Stiles. He decides to re-work the Code with Allison in the mid-Season 3 finale and "protect those who cannot protect themselves", since the Nemeton had been revitalized. During Season 3B, when the Oni appear in Beacon Hills, Chris relays a tale to the group in "Silverfinger". 24 years earlier, at the age of 18, Gerard had Chris conduct his first gun deal leaving out the fact that the customers were Yakuza. During the meeting, three Oni appeared and went after the Yakuza boss, the kumichō, who was supernatural, possessed by a Nogitsune. Chris had survived and saved the life of a man called "Silverfinger" by shooting one of the Oni directly in the face, shattering its mask. Chris and Derek also come to solve their differences in "Letharia Vulpina", when Derek saves his life, shielding Chris from the blast of a bomb, and after Derek is freed from the Nogitsune possession in "De-Void", Chris tells Derek he's not his enemy anymore. In the penultimate episode of Season 3, when he shows Allison how to cast a silver arrowhead to graduate as a hunter, Allison takes the time to tell Chris she loves him and she's proud of what they've accomplished. Chris later arrives at the Oak Creek camp and sees that Allison has been killed. In "The Divine Move", Chris feels devastation, but knows how to deal with it saying he has the capacity and a skill to compartmentalize his emotions. He actually comforts Isaac over the latter's sorrow. Isaac figures out that Allison wanted Scott to tell him that she had destroyed the Oni with her silver arrowhead. He has Chris recall his first deal where he'd shot off an Oni's mask; Chris had fired a silver bullet, but the bullet must have gone through and through: silver is a poison to the Oni. They come to the school and destroy the remaining Oni with the arrowheads avenging Allison. Chris leaves Beacon Hills for France with Isaac in tow to permanently put away the Nogitsune trapped in the triskele urn and to help each other come to terms with the death of his daughter.

In Season 4 "The Benefactor", Chris returns to Beacon Hills after receiving Scott's text telling him Kate is alive and in Beacon Hills. Chris arrives just in time to help Scott corral and subdue Liam. While apparently dealing with Allison's death, determined to honor her by upholding her Code and resolved to protect her loved ones during the Dead Pool situation, Chris is shown to be desolate, harboring immense grief. He receives a visit from the Calaveras who come to enlist him in hunting Kate, intending to have Chris return to the ways of the Hunter's Code. In "A Promise to the Dead", Chris tracks Kate's Berserkers to the sewers, but he's captured by Peter. The werewolf pegs Chris to the sewer wall through a rebar, then bends it, trapping him. He is found by Parrish but eventually Chris tells Parrish to just leave him, to warn Scott about Peter and Kate, and gives into his pain, fatigue and ultimately grief, telling Parrish, "I've got nothing left". Parrish refuses, telling Chris he knows about Allison, and how she felt about Scott. He enthralls Chris to use anger over how Allison would feel if Scott were in danger, and Chris eventually breaks free. In "Smoke and Mirrors" Chris and Parrish, along with the Calaveras arrive at La Iglesia and face off against Kate and her Berserker. Chris subdues Kate, shooting her with a yellow monkshood laced bullet. Kate defends her actions telling Chris that Scott and his friends killed Allison. Chris firmly tells Kate that Allison died saving her friends' lives. He admits he won't kill his sister, but wonders is she even worth saving. When Kate escapes, Chris leaves with the Calaveras to hunt her down as his part of a deal he eventually made with them; in exchange they have to leave Scott's Pack in peace.

In Season 5B "The Last Chimera", Chris returns to Beacon Hills as backup called by Scott, helping the latter, Stiles and Malia escape from the Dread Doctors. In "Damnatio Memoriae", Chris visits Gerard knowing he needs his father's knowledge. In contempt, he hands his crippled father the yellow monkshood plant which heals Gerard of his ailment. Chris questions him on the Dread Doctors knowing his father has information. Gerard replies the para-scientists' success is a resurrected creature that's actually connected to their family: the Beast of Gévaudan. In "The Sword and the Spirit", Chris shows Scott (who is affronted by his decision to heal and recruit Gerard) the frescoe in the Dread Doctors' hidden lair depicting the Beast fighting a creature known as a hellhound with bodies littered below the fray - bodies of Scott's allies, Pack and Beacon Hills.

In Season 2, Peter appears as a young man in Lydia's hallucinations, successfully seducing Lydia before revealing his true identity, to her horror. He lives on in Lydia's mind. Peter knew Lydia would be immune to the Bite, so instead Peter had imprinted his memories within Lydia as his back-up plan, should he be killed. He psychologically tortures her into following his instructions. In "Party Guessed" by using Derek's healing ability as an Alpha and the light of the Worm moon, Peter successfully has Lydia resurrect him. It is revealed by Deaton, that Peter lost his Alpha status upon resurrection and his abilities are subsequently impaired.^[9]

Throughout Season 3, Peter has an uneasy alliance with Derek and the gang after helping them against the Kanima. It's depicted in the past that even before the fire, Peter was a conniving manipulator; he started a chain of events that lead to the death of Derek's first love, Paige. Peter felt envy and resentment over his older sister Talia's leadership of their family, firmly believing the role of Alpha was his. Sneaky as ever, Peter has shown to somewhat care about his remaining family, Derek and his other niece Cora, most likely out of convenience and survival. When Cora is dying of mistletoe poisoning in "Alpha Pact", Peter tells Derek of a technique to cure sickness with pain transference as a way to save her, but he'll give up his Alpha status. When Derek decides to go through with it, Peter grins in triumph. In the mid-Season finale, after Scott becomes a True Alpha, Peter prevents Jennifer from attempting to re-energize herself using the Nemeton again. The Darach reveals she knows he plans to kill Scott. Peter kills Jennifer, boasting that he's "always been the Alpha". In Season 3B, Peter goes along with Derek on the latter's mission to recover his sister Talia's claws from the Calaveras. Derek has Peter use Talia's claws to conduct a ritual so Derek could communicate with Talia's ghost, in exchange he tells his nephew he wants to keep the claws. In "Letharia Vulpina", Peter tells Lydia he will help her control her banshee powers on the condition that she do something for him: he wants her to listen to Talia's claws and translate a memory Talia stole from him before the fire. Lydia manages, and she discovers that Peter had fathered a child, the werecoyote Malia Tate, but refrains from telling him her name. In "De-Void", after the Pack paralyze Void Stiles' body, Lydia calls Peter for help. He complies, but Lydia has to give him his child's name. Peter shows Scott how to utilize an Alpha's power to meld minds so that he and Lydia can enter Stiles' mind to find Stiles and guide him back. Lydia gives Peter Malia's name.

In episode "117" of Season 4, Peter comes face-to-face with Malia, though Malia is initially kept in the dark about her relation to him. Peter has also regained his full strength and werewolf abilities. He learns of Kate Argent's survival and faces off against her when she infiltrates the Hale vault, but the Benefactor simultaneously robs the Hales' fortune, $117 million in bearer bonds, to his anger. In "Orphaned", Peter approaches Kate with a proposition: he offers her control over her werejaguar shapeshift. In return, she helps him recover his money and implement his plan to kill Scott. In "Time of Death", Peter meets with Malia after she finds out he's her biological father, showing her the file confirming her adoption. He offers her his help in finding her biological mother whom is known as 'the Desert Wolf'. After it's revealed Meredith Walker is the Benefactor in "Monstruous", Peter, reading Meredith's mind, sees that through Meredith telepathically hearing his vengeful thoughts, he'd concocted the Dead Pool plan. He is amused by the whole ordeal, saying the 'plan' was the ravings of a lunatic, that comatose for a werewolf is beyond torture. At the end of Season 4, Peter and Kate initiate the plan to kill Scott. Kate abducts Scott and transforms him into a Berserker. Peter goes along with the Pack when they rally to go up against Kate, ostensibly promising Malia she'll meet her mother if she kills Kate, and imploring the Pack not to hold back against the Berserkers. The plan fails at the last minute when Scott is able to break free of being a Berserker. Scott confronts Peter that he figured the plan out to kill him for power. Showing his true colors, Peter viciously retorts that he pursues power for his family, that the one to inherit it is him, telling his werewolf progeny he doesn't deserve his power. Peter clashes against Scott. Peter gets the upper hand but Scott triggers new strength and swiftly defeats Peter, telling him he "was never an Alpha, he was always a monster". Peter is drugged with yellow monkshood, brought back to Beacon Hills, and incarcerated in the prison of Eichen House for supernaturals. Peter vehemently swears he will find a way out.

Victoria is an attentive wife and mother, and like Chris overprotective of Allison. However she can be overbearing and prone to fits of rage. In "Lunatic", when Derek Hale is on the run after being framed for the attempted murder of Allison and the kids at the high school, Victoria coldly states that the hunters are to "find (Derek), kill him, cut him in half". In the Season 1 finale she demands Allison keep quiet over her introduction to the supernatural. Victoria is not above torture to get what she wants, as in "Shape-Shifted" she electrocutes the principal of Beacon Hills High to have him resign so Gerard could take his place as part of a plan to keep an eye on Beacon Hills' werewolves. When Victoria suspects Scott and Allison are still seeing each other after she and Chris had forbade them to, she mutilates her arm in "Ice Pick", so to ask Scott's mother Melissa questions on Scott. In "Frenemy", she takes a job as a substitute teacher to completely keep an eye on her daughter. In "Raving", Victoria inconspicuously sees Scott and Allison kissing. To keep Scott away from Allison for good, she ambushes him at the rave party during the sting operation to capture the Kanima. She attempts to murder him by triggering his asthma with wolfsbane. Scott lets out a howl for help, but Victoria maliciously believes he's on his own. Derek however, fights her off and saves Scott, Biting her in the process. In "Party Guessed", Bitten, changing into a werewolf, Victoria must now commit suicide to obey the hunter's code, which Gerard endorses. She writes a goodbye letter to Allison, feeling genuine sorrow that she didn't get a chance to talk to her daughter one last time as Allison had took off to Lydia's party. Upon the full moon rising, she feels the transformation happening. Overwhelmed, she confesses she can't pull off her suicide by herself and asks Chris to help her. Together, they impale her upon a knife. Victoria dies in Chris' arms.

Victoria's death causes Allison's devastation and moral spiral at the end of Season 2, but also Chris' defection from the hunter's cause. Victoria's attempt to murder Scott is unknown to Allison until Season 3, as Scott didn't want her actions to be Allison's last memory of her mother. During Season 3A, Victoria appears in flashbacks, and mental visions to Allison.

In "Wolf's Bane", Harris is questioned by Sheriff Stilinski regarding the murderous events that take place during Season 1 after the Alpha werewolf tries to kill him. Harris reveals that six years ago, he babbled to a woman on how to set a house on fire and make it look like it was not an act of arson after she got him drunk. A few days after he gave this information, a house caught on fire and was burned down (the Hale family mass murder). The woman he gave information to is revealed to be Kate Argent. In Season 2, Harris is believed to be the Kanima's Master, because his car was stolen by the Master and was identified to be at the presence of several of the murder sites. He was proven innocent by Stiles and Scott.

During Season 3, in episode "Unleashed", it's revealed Harris was a former military officer and so he was sacrificed as a Warrior. Before he was abducted from his classroom, he left behind a clue to the gang in his test papers allowing Deaton to identify the killer as a Darach. He begged for his life, saying the Darach still needs him. He knew who and also about this person's motives, but the Darach kills him. Later in "Currents", Stiles uncovers Danny's proposed telluric currents project for Harris along with a note to Danny directly from Harris to stay away from the subject. This allows them to figure out the Darach's abductions and sacrifices are aligned with the telluric currents around Beacon Hills, and that Harris wasn't only sacrificed, he knew something. It's implied that eventually Harris' body was found off-screen since Sheriff Stilinski had labeled him when he's investigating possible supernatural explanations of some crimes.

During Season 1, Sheriff Stilinski goes to Alan for help when the murders are implied to be animal attacks. Alan, however, apparently knows more than he lets on. In "Co-Captain", after Scott is shot with a wolfsbane laced bullet by Kate Argent, Alan finds Scott and treats him revealing that aside from working with animals, he also works with werewolves, healing them. In "Formality", Alan remains calm when Peter Hale, the Alpha werewolf comes for Scott. Peter is repelled by the clinic's balustrade is made of mountain ash. In Season 2, Alan helps Scott, Stiles, and Derek and his Pack against the Kanima. Alan is later visited by Ms. Morrell, the school guidance counselor and French teacher, who confronts Alan over the wisdom of having Scott and his allies dealing with the current situation and "what's coming". Alan reveals to Derek in "Fury" that he had been a trusted adviser to the Hale family for a long time and that he made a promise to Derek's mother that he would help Derek and look after him if anything were to happen to her. Alan helped Scott prepare the mountain ash laced pills to swap with Gerard's cancer medication when Scott figured out Gerard's plan to be Bitten by Derek. In the Season 2 finale, after Gerard's plan fails, he and Morrell begin tracking him, Morrell saying she's glad he's out of retirement. It is revealed that the upcoming threat Alan and Morrell mentioned was an Alpha Pack.

In Season 3, Alan has taken on a mentor-like figure to Scott and all his friends. In the episode "Unleashed", Stiles comes to him concerning a new killer committing Human Sacrifices, having linked the murders to the Druid order, and that he always seems to have more information than anyone else. When Stiles demands why he's always so cryptic and withdrawing, Alan alludes to a dark past that presumably caused him to go into retirement when he answers that spending the past decade "trying to push something away" with the lies and the denial becomes a pretty habit. When Lydia calls saying the music teacher has been taken for to be sacrificed he helps Stiles and Lydia identify the new killer as a Darach. He also identifies the pattern of the sacrifices of being groups of three offering the Darach its type of power - Virgins, Healers, Philosophers, Warriors. It is discovered Marin is actually his younger sister, and that they are both Emissaries, Druid practitioners, that function as advisers to the werewolf Packs and ambassadors between them and humanity. Alan fulfilled this role for the Hale family, and was especially close to Derek's mother, Talia Hale. In "Alpha Pact", he helps Scott, Stiles and Allison find their parents, by proposing they take a sacrificial Druid ritual in order to locate the Nemeton which will have consequences for them, leaving a "scar" around their hearts for the rest of their lives and being substitute Guardian sacrifices for the parents which will fully revitalize the Nemeton, subsequently attracting the supernatural to Beacon Hills like a magnet. They decide to do it, to sacrifice themselves temporarily with someone to pull them back as a tether. Alan fulfilled this role for Scott. Later, Alan, with help from Cora and Lydia, saves the lives of the twins, Ethan and Aiden after they're nearly killed by the Darach.

In "Anchors", Scott and Stiles come to Alan concerning their and Allison's symptoms as a result of the Druid sacrifice. He informs them that when they died and subsequently resurrected, they essentially opened 'a door' in their minds which is still ajar. He tells them an opening into their minds is dangerous, that they each need to 'close that door'. When it's revealed the Nogitsune is possessing Stiles, Deaton heads to Japan in "Letharia Vulpina", to retrieve a sample of a plant called letharia vulpina that was born out of the blood of the very Nogitsune Chris Argent saw killed 24 years earlier, which makes the plant "quite special". Upon arriving back in Beacon Hills, he poisons Stiles with the plant which temporarily breaks the Nogitsune's hold over Stiles. After Scott retrieves the Shugendō scroll in "Echo House", which has instructions on how to exorcise a Nogitsune, Alan translates that the host's body has to be changed. In "The Divine Move", Alan confirms that the Hales' triskele urn could imprison the Nogitsune because it was crafted by Deaton himself, out of wood of the Nemeton tree. At Season 3B end, after Allison's death, Alan provides counsel for Scott with the fallacy "Regression to the Mean", saying things will stop being all bad, or all good and always revert to a neutral space. In Season 4, Alan sets out to learn what Kate did to Derek, causing him to revert to being a teenager, the subsequent loss of his werewolf abilities and what it means for him. He visits an inmate at Eichen House's prison for supernaturals, Gabriel Valack. When Valack asks him why, Alan answers he made a promise to a woman he loved (Talia Hale) that he would look after Derek. Valack inflicts a psychic vision upon Alan concerning La Iglesia. Lydia snaps Alan out of his vegetative state with a Scream. Deaton tells the Pack the old Mexican church is where Scott and Kira will be found after they're abducted by Kate.

In Season 5, "Parasomnia" Deaton examines the claws of the mutant werewolf who attacked Scott. He's concerned that he seemed to be able to absorb Scott's power when only Liam should be able to do that. In "Dreamcatcher", he examines new supernatural Tracy Stewart after her killing spree and keeps her sealed within a mountain ash barrier. Tracy, however, escapes through the barrier. After Tracy is killed, Deaton stores her corpse in the clinic and studies her. He reports to Scott Tracy had the claws of a werewolf but the venom and scales of a kanima. He also realizes the werewolf mutant and Tracy couldn't be supernatural, born or Bitten: they had to have been artificially made. Deaton is shaken saying someone has blurred the lines between science and the supernatural, changing the rules. He tells Scott he has to leave for a few days. In "Ouroboros", Deaton is in Russia, and discovers an old lair used by the Dread Doctors. He takes a particular tooth out of a container which he calls an answer. Right afterwards, Deaton is confronted and captured by the assassin, the Desert Wolf who interrogates him on whether her daughter (Malia) is alive or not. He's taken along with the werecoyote across the borders. In "The Sword and the Spirit", Deaton is used as bait for a trap for Malia by the Desert Wolf.

Natalie is not on good terms with her divorced husband accusing him of forcing Lydia to chose which parent she'd rather live with during the parent teacher conference in Season 1 "The Tell". Natalie is seen at her daughter's bedside after she's attacked by Peter Hale in "Code Breaker". In Season 2 "Abomination", because of Lydia's behavior due to the deceased Peter's control of her, she wants Lydia to see Ms. Morrell, the high school guidance counselor, and becomes all the more resolved when she sees her daughter's hand bleeding from punching a mirror. In Season 3 episode, "Alpha Pact", Natalie comforts Lydia after Jennifer Blake tried to kill her by strangulation. She tells Lydia she could have the marks covered with make-up, using a patented method she had of covering up her own fair "share of hickies" when she was in high school. Lydia instead tells Natalie, she doesn't want to cover the wound, saying someone tried to kill her, she survived, and she doesn't have to hide that. Natalie is surprised at, but later approves of Lydia's maturity.

In Season 3B, Natalie takes the position of biology teacher at the high school after Adrian Harris is found dead. Lydia is somewhat embarrassed by this, but Natalie asks Lydia not to embarrass her. In "Letharia Vulpina", Natalie is seen talking to Peter Hale at the school, to Lydia's distress. Natalie tells her Peter said he is in Health department to give hearing tests to patients, but Lydia figures out this is a subtle message by Peter offering to help Lydia control her banshee ability. Lydia tells her mom the card he gave her is a phone number. Natalie brightly replies, "I know. Still got it." In Season 4, "The Benefactor", Natalie allows Lydia and her friends use the Martins' lakehouse, but asks her to lock up the basement because she thinks a "pack of wild animals" managed to get in (Malia's use of the basement to keep herself restrained during full moons). When the juniors are taking the PSATs in "Weaponized", Natalie oversees the examinations. She notices red and white lesions on Sydney, a student who'd collapsed, and Coach Finstock. She promptly calls in the CDC. Natalie hopes she's wrong, and she'll be "the crazy biology teacher who panicked for nothing". In "Time of Death", Natalie notices Lydia's multiple escapades to the lakehouse. She asks her daughter if she can help with anything. Lydia shows her the photo of Meredith Walker, whom Natalie recognizes. Natalie tells her daughter the story of her paternal grandmother, Lorraine Martin who was interned at Eichen House.

In Season 5 "Parasomnia", Natalie is holding a session with a senior, Tracy Stewart. Tracy tells her she's having trouble sleeping, she gets night terrors. She assures Tracy her problems could be just anxiety, which most seniors experience. Suddenly, Tracy vomits up black barf along with raven feathers all over Natalie's desk. Natalie acts rationally telling Lydia people with night terrors have done far stranger things than "eating their pillows". In "Dreamcatchers", Natalie had been asked out on a date by Stilinski and they meet at the station. Suddenly they notice several deputies paralyzed. Lydia and Kira appear with Lydia yelling at Natalie saying Tracy's coming for her. Natalie is confused, but then Tracy attacks, jumping down off the roof. A horrified Natalie sees Tracy, in her kanima shape with a tail and glowing yellow eyes, in plain view. Tracy eventually paralyzes Natalie, but she is saved by Malia who takes Tracy down. In the aftermath, Natalie is shaken, but upon seeing Lydia bleeding, she rushes to her daughter's side. In the hospital, Natalie comforts Lydia as she's going into surgery. Lydia implores her mother to keep quiet about what she saw. Natalie responds all she saw was some "lunatic girl trying to kill everyone", after a moment of hesitation. In "Lies of Omission", Natalie holds a class, when a new Chimera Beth runs out of class. Natalie attempts to tell Malia to leave Beth alone and focus on the class. Malia calls Natalie out that she "knows something" and flashes her werecoyote eyes. Natalie isn't surprised at all, but resolutely overlooks this display and insists the kids focus on school. In "The Last Chimera", when Lydia is rendered catatonic, Natalie is distressed and out of fear for her daughter's life, angrily refuses to allow Stiles to see her, blaming him and her friends for her state of mind. She later signs Lydia to be transferred to Eichen House with Dr. Conrad Fenris (actually Valack in glamour) promising her her daughter will be taken care of.

In Season 2, Danny helps Jackson recover lost footage from his camera which Jackson shot for his first full moon transformation with Jackson's instruction not to watch the footage. He manages to do so with help from Matt Daehler whom he is attracted to. He doesn't act on his attraction because Matt's into Allison. In "Frenemy", he is shown to be depressed over his break-up with his ex-boyfriend at the gay club, Jungle. Presumably, because the Kanima's Master wanted to remove any evidence, Danny is attacked at the club, but is only paralyzed by the Kanima and the footage Danny recovered from Jackson's video has vanished. In the episode, "Battlefield", he is warned by Jackson to not get anywhere near him during the lacrosse finals game, most likely because Jackson is somehow aware he is the Kanima and is killing people.

In Season 3, Danny develops an interest in Ethan, one of the Alpha pack,^[10] unaware that Ethan was originally using him to get leverage on Scott. Although Danny doesn't realize it, his relationship with Ethan softens the werewolf to the point where he is willing to change for the better going as far as meeting Scott and Stiles halfway. In episode 7 "Currents", Danny is lethally poisoned with mistletoe by the Darach and his lung collapses. Ethan, obviously excessively worried about Danny, helps him to the hospital, where Melissa McCall saves his life using a needle thoracostomy. It's revealed Danny was targeted by the Darach because he did a project on telluric currents which were placed on the locations of where the Darach was sacrificing his victims. Despite the fact that Ethan was only supposed to manipulate Danny's feelings to gain information, as Aiden had been assigned to do with Lydia, he eventually fell in love with Danny and is shown to have several tender moments with him. However, in season 3B, after their separation and Ethan and Aiden later decide to re-enroll in high school, Danny is shown making out with Damon, his ex, which Ethan is clearly upset about, to Aiden's amusement. In "Illuminated", because of the power outage, Danny wants to hold a black light party, but is cut down. Ethan and Aiden help him out by acquiring a power generator and letting him use Derek's loft for the party. Danny is very pleased with the results and bonds with Ethan again. In "Letharia Vulpina", Danny is seen with the cross country team on the track where traps are laid by the Nogitsune and Ethan tackles him to protect him and says he missed Danny and proceeds to make out with him. When Coach Finstock is shot by an arrow triggered by a trip wire, Danny looks on while Ethan stays protectively beside him. In "The Divine Move", Ethan comes to break up with Danny, saying he can't stay after Aiden's death. Danny lets Ethan down gently, breaking up with him instead, saying that while he likes Ethan, he can't date a werewolf - Danny was aware of the supernatural all along, to Ethan's surprise. Ethan gives Danny a kiss goodbye.

Show creator Jeff Davis reveals at the SDCC 2015 Danny graduated early during junior year.

Teen Wolf: The Hunt, a Teen Wolf inspired social network game, states that Danny was born on Leap Day (February 29) and likes computers and photography. He is a fan of Jay-Z, Bruno Mars, and Janelle Monae.

Unlike Chris, Kate is bloodthirsty, deadly and cruel, taking pleasure in hurting any werewolf she can. Kate is also very rife with sexual innuendo, using her sexuality to her advantage. Kate was responsible for orchestrating the Hale Fire, murdering Derek Hale's family six years previously. Despite her sociopathy and sadism, Kate is close to her niece Allison, whom she gives a necklace which depicts a wolf for her 17th birthday in "The Tell". Kate is revealed to have been the woman whom got chemistry teacher Adrian Harris intoxicated at a bar and had him reveal to her how to start a fire "and get away with arson" as Harris relayed to Sheriff Stilinski in "Wolf's Bane". However Harris also drew him a necklace he saw Kate wearing that night, the same necklace she gave to Allison. In "Formality", Kate reveals the supernatural to Allison by showing her a captured Derek in werewolf. In the past, Kate also had a sexual relationship with a younger Derek Hale simply to track down the Hale Pack and set their house on fire. In the Season 1 finale, Kate lies to Allison that all werewolves are monsters and entices Allison to join her in the hunt for Derek and Scott after it's discovered Scott is the other Beta werewolf. She nearly kills Scott, but Chris stops her, confronting her about her involvement in the Hale fire and threatens to shoot her if she doesn't lower her gun. Peter Hale, the Alpha werewolf arrives at that moment and takes everyone down before capturing Kate. Peter demands Kate apologize for decimating his family if she wants to save Allison. Though faced with death, Kate apologizes only to Allison. Kate is later killed by Peter as revenge for the Hale Fire, slashing her throat. After Peter Hale is killed, the necklace is left on Kate's corpse as evidence for her part in the arson. During Season 3B, Kate appears in visions and nightmares to Allison as a result of the Allison's Druid sacrifice.

In the Season 3 finale, it is revealed Kate survived Peter's attempt on her life. She appears and attacks a team of the Calavera hunters in Derek's loft before shooting Derek himself and abducting him. Kate had become supernatural as she transforms into a shapeshifter, a werejaguar, because Peter had slashed her throat. It's depicted in flashbacks Kate's body had begun to heal after she was killed with Peter's claws: she was coming back to life. The Calavera hunters inconspicuously came to check if Kate was really dead and saw her transforming instead. They switched out Kate's body from the morgue and took her to Mexico. They demanded Kate kill herself to follow the Hunter's Code. Instead Kate faked her suicide, and when the hunters inspected her, she killed half a dozen of Araya's men and escaped. Kate lacked control over her shapeshifting, leaving a trail of bodies behind her. Kate was instinctively drawn to La Iglesia, the ruins of an Aztec temple which worshipped Tezcatlipoca, a werejaguar god. With her own werejaguar status, Kate discovered a pair of Berserkers and gained control of the two monsters giving herself muscle and protection. While in hiding, Kate discovered a cassette someone had anonymously left her; the tape revealed information about the Hale Pack, specifically their artifact, the Triskelion. The artifact was used by the Hales teach their young control on a full moon. Needing to learn control, Kate decided to acquire the Triskelion, which lead to her kidnapping Derek.

In "The Dark Moon", it is revealed Kate had taken Derek to La Iglesia. Using the power of her species' god, Kate had Derek regressed to the time of his life before she'd set the fire when he was in love with her. In "117", Kate has Derek reveal the location of the Hale Vault to her and has the Berserkers hold off Scott and his Pack. Derek hands her the Triskelion. Peter arrives just then totally amused, letting Kate know the Triskelion doesn't have magic that teaches a shapeshifter control, it was a physical placebo for young Betas to focus on. Angered, Kate faces off against Peter, but smoke bombs go off by an unseen figure. In the chaos, Kate escapes and calls off the Berserkers. Kate had been tricked into opening the Hale Vault so the Benefactor could steal the Hales' fortune, to use for financing the Dead Pool. As assassins begin arriving in Beacon Hills over Season 4 for the money, Kate begins a manhunt for the Benefactor, whom she realizes left her the cassette to find, leading her to killing 'the Orphans', then confronting Scott and Chris. She tells Chris she needs more time for learning control before eventually confronting him. When the Berserkers overpower them she spares Chris' life when one Berserker almost kills him. Kate is later approached by Peter, her would-be killer. She accepts his deal, he offers her control over her shapeshifting, she helps him get his money back and help to implement his plan to kill Scott unaware he plans to stab her in the back. Kate masters control later on. She attacks Scott and Kira in "A Promise to The Dead", abducting them and taking them to La Iglesia. Kate had learned from Peter her species, the werejaguar, as "La Loba", she has the talent not only to control the Berserkers, but also to create new ones using a vessel. Kate has Scott transformed into a Berserker planning to have him fight his friends so to have them kill him, or vice versa. In "Smoke and Mirrors", Kate faces off against Scott's allies along with the Calaveras. Her and Peter's plan to kill Scott and his Pack fails. She kills multiple hunters, but she is taken down by Derek who severely mauls her in his new full wolf shapeshift, and being shot by Chris with a yellow monkshood laced bullet. Kate appeals to her brother saying her intentions were to have their family return to power after it's decimation, and to have Scott and his Pack killed because she blames them for Allison's death, saying they killed her. Kate tells Chris she knows he won't kill her and escapes.

Isaac was the first of Derek's Beta werewolves to gain control of his animal side during the full moon, and in spite of his dark family-life, Isaac has good intentions and a warm heart. At first, Isaac did not like Scott and did not trust him, because he believed Scott was a loser because he wondered how Scott survived so long without a pack. Nevertheless, he eventually trusted Scott when he realized he has good intentions, and becomes friends with him. Among the dangerous events throughout Season 2, Isaac sides with Scott, revealing that he trusts him and holds onto Scott's friendship because he doesn't have anyone there for him. He helps Scott against Gerard when Gerard takes control of the Kanima, but he is stabbed by Allison. After Jackson is cured of being a Kanima and Gerard's defeat, Isaac stays as a part of Derek's Pack instead of following Boyd and Erica, but holds onto Scott's friendship.

At the start of Season 3A, Isaac is revealed to have found where the Alphas have been keeping Erica and Boyd, however he was attacked by them and had his memory wiped. Isaac was rescued by a mysterious woman. To cure his amnesia, Dr. Deaton helps Isaac remember the night he had his memory wiped using an ice bath and remembers that Erica is already dead, while Boyd is being held captive by the Alphas with another werewolf named Cora. He later participates in helping Scott and Derek capture Boyd and Cora, who are rabid from the full moon with assistance from Chris Argent. Isaac takes on a despise the twins, Aiden and Ethan, blaming them for the supposed death of the girl who saved him and the numerous sacrifices, and stands off against them. Allison apologizes to Isaac for attacking him back in Season 2 and assists him in his vendetta against the twins. He teams up with her against the threats throughout the season becoming closer, eventually forgiving and developing feelings for her. After being thrown out of Derek's loft by Derek to protect him from Derek himself, he moves in with Scott and Melissa. In "Alpha Pact", Isaac later becomes fed up over Derek's intentions, the deaths of Boyd and Erica, and confronts him about how people always get hurt around him and his pursuit of power, leading to him rejecting Derek as his Alpha and leaving Derek's Pack. Isaac is chosen to be Allison's tether when she undertakes a dangerous druid ritual to find her father. During the mid-season finale, he helps Allison, Stiles, and Scott find their parents. With Scott becoming a True Alpha, Isaac joins his Pack.

In "Anchors", Isaac starts acting on his feelings towards Allison, even attempting to kiss her, following her for her protection and arriving at her apartment, to her mutual consent. He is open about this with Scott who is evidently uncomfortable at their budding relationship. Isaac still holds a grudge towards Ethan and Aiden saying they can't join Scott's Pack because of their part in Boyd's murder and taking glee when Scott says no. After helping Allison with research on William Barrow, Isaac is confronted and "tagged" by the Oni. He later helps Allison and Chris retrieve information about the Oni, Kitsune and the Nogitsune from the Yakuza recluse, Katashi "Silver finger". He and Allison affirm their feelings for each other when Allison kisses him. Isaac is induced into a coma in "Letharia Vulpina", saving Allison from stepping into electrified water as one of the traps set by the Nogitsune possessing Stiles. In "De-Void", Isaac comes out of his coma and heals from his injuries, to Allison's happiness and they spend the night together, consummating their relationship. In "Insatiable", after Isaac is freed from the Nogitsune's possession, Isaac assists in looking for Lydia. He and Allison share a moment where he assures her he was himself during their night together before the Nogitsune infected him. After arriving at Oak Creek, Isaac fights alongside Allison and Kira against the now Nogitsune-controlled Oni. He is eventually outmatched and by the Oni. He is saved by Allison, who is fatally stabbed by the Oni right afterward. Visibly shocked and stricken, Isaac watches on as Allison dies in Scott's arms. In "The Divine Move", Isaac is devastated by Allison's death and finds comfort from Chris. Later, Isaac figures out that she had discovered that silver was the Oni's weakness and that her arrows could destroy them. Chris and Isaac head to the school with the arrowheads and kill the remaining Oni. After Scott and Kira exorcise the Nogitsune, Isaac seals the dark spirit in Derek's triskele box. At the end of Season 3B, Isaac decides to leave Beacon Hills, moving out of Scott's house and heading off with Chris to France to put away the Nogitsune for good, and help Chris cope with Allison's death.

"Teen Wolf: The Hunt", a Teen Wolf inspired social network game, states that Isaac was born on September 22, and likes lacrosse and BMX. He is a fan of M. Ward, Belle and Sebastian, Coldplay, and Feist.

In 2006, 9-year-old Matt had gone to Isaac Lahey's house to trade superhero comic books with him. The swim team of Beacon Hills High at that time was having a pool party at the house and drinking alcohol to celebrate their winning the state championship. Matt was thrown into the pool by Camden, Isaac's older brother, despite yelling that he can't swim, resulting in him almost drowning. He was resuscitated by Coach Lahey who berates him about not knowing how to swim and demands he tell no one what happened. Matt obliged keeping the incident secret for years, causing himself trauma and having irregular nightmares where he's drowning.

Back during the Argents' funeral, when he was photographing Allison, Lahey had got in one of his shots. Matt'd felt an unbelievable rage for his near-drowning years earlier and wished that Lahey was dead. The following morning he found out Lahey was dead. In "Shape-Shifted" he'd spied on Jackson using his camera and witnessed his transformation into the Kanima. He and the Kanima touched hands seemingly by instinct. Through a supernatural bond that formed between the two of them he saw that Jackson had killed Lahey for him and Matt became Master of the Kanima. He used the Kanima to murder all members of the swim team who were involved in the incident, except for Jessica Bartlet whom he killed directly.

In "Fury", at the Sheriff's station, Matt has Jackson murder all the deputies on night shift, destroys all the evidence linking him to the murders and takes Scott, Stiles, Derek, Stilinski and Melissa hostage. He reveals he knows all about the supernatural events occurring and demands Scott hand over the bestiary. He needed answers as to why he was beginning to transform into the Kanima, but Derek silently realized Matt had broken the rules of the Kanima. The Master is to use the Kanima to kill murderers, while Matt had him kill innocent people and he had killed people himself. The hunters attack the building and in the struggle between the Argents, Jackson, and Scott and Derek, Matt escapes but Gerard kills him by drowning him, using this opportunity to become the Kanima's new Master.

As a result of his childhood trauma, Matt became a teenage killer, psychologically unstable, dangerous. He irrationally called Lahey and the swim team murderers saying they 'murdered' him. He was also a stalker, relentlessly pursuing Allison by taking photos of her and photo shopping himself into these pictures depicting they were in a relationship. As Master of the Kanima, Matt gained abilities to control the Kanima through a supernatural bond. He could communicate with Jackson telepathically, control him also as a human, sense him from a distance and speak through him. The bond between Master and Kanima was affected akin to Matt's personality; Jackson, as the Kanima would share his fear of water, and his affinity for photography: to target a victim, Matt just had to take their picture or think about killing them, then Jackson would kill them.

In "Shape-Shifted", Gerard goes undercover as the principal at Beacon Hills High. When Gerard figures out that Scott is a werewolf in "Abomination", he blackmails Scott into following his orders by threatening to kill Melissa. Scott complies supplying him with information and becoming a member in Derek's Pack. Gerard heartlessly endorses that Victoria must kill herself after Derek Bites her and uses her death to emotionally manipulate Allison into joining him. In "Fury", Gerard kills Matt Daehler and becomes the Kanima's new Master. He then steps up as the main threat, threatening Melissa McCall's life again, and abducting and beating Stiles as a message to Scott. In the Season 2 finale, during the showdown at the industrial warehouse between Scott, Derek, Isaac, Chris, Allison, and Jackson as the Kanima, Gerard surprisingly has the Kanima hold Allison hostage. It comes out that he has cancer; all of Gerard's scheming and his genocide campaign was all a ruse for to push Derek into a position to Bite him, become a werewolf, kill Derek to become an Alpha, to ultimately cure himself. He has the Kanima threaten to kill Allison unless Scott has Derek Bite him. Chris is incensed at his father's actions and betrayal, after he pushed for Victoria's suicide all while what he was planning and threatening his daughter's life. Gerard fires back at Chris he'd kill his son so he'd survive. Scott follows his orders and Gerard is forcibly Bitten by Derek, and he holds his Bitten arm in victory. However, because of a plan by Scott, he and Deaton had replaced Gerard's cancer medication with mountain ash filled capsules. Gerard's body violently rejects the Bite, black ooze eschewing out of his ears, eyes, nose and mouth and he is incapacitated. After Jackson is cured of being a Kanima, Gerard disappears.

During Season 3, Gerard is shown to be alive, in hiding and living at a medical home. His cancer has now vanished, but is confined to a wheelchair and is consistently suffering the effects of the rejected Bite, black liquid still pouring out of his orifices. He reveals to Chris that one of their family members in 1977, Alexander Argent, his brother, was bitten by the Alpha werewolf, Deucalion. In "Visionary", Allison and Scott come to him for information about Deucalion's Alpha pack in exchange for Scott siphoning some of his pain. Gerard lies to them about Deucalion ambushing him and killing his men when they met with Deucalion's pack during Deucalion's proposed peace offering, when it was actually Gerard himself who ambushed all involved parties, killing Deucalion's Pack members and killing his own men because they wanted peace with the Packs (which Scott catches onto). He'd also stabbed Deucalion in the eyes with two arrows which caused Deucalion's blindness. Gerard's treachery is what caused Deucalion to become the sociopath he is in the present, and lead to the Alpha Pack being formed. However, he truthfully tells them that while Deucalion is blind, he can actually see in his werewolf form. Scott threatens Gerard; if he finds out that the story he told them about how Deucalion truly lost his eyesight was a lie, and people get hurt, he will return to "take away more than (Gerard's) pain".

In Season 5 "Damnatio Memoriae", Gerard still ejecting black ooze is visited by Chris. Chris reluctantly produces yellow monkshood to Gerard's surprise. The older man eats the plant's flowers voraciously which fully heals him of his ailment. Chris tells his father he knows he's kept eyes and ears open. Gerard responds that he knows of the Dread Doctors' success. The creature is a resurrected monster which is personally connected to their family: the Beast of Gévaudan. In "The Sword and the Spirit", Gerard reveals himself alongside Chris to a stumped Scott, but the showdown is cut short by the sight of the Dread Doctors' terrifying frescoe depicting the Beast fighting a creature Gerard identifies as a hellhound, a guardian of a supernatural location, - amongst bodies littering Beacon Hills. Gerard and Chris then visit Parrish: Gerard informs and confirms Parrish's supernatural species as a hellhound.

At the beginning of Season 3, Marin is revealed to be somehow involved with Deucalion, the Alpha Pack leader. She is actually Alan's younger sister and they are both practitioner druids called Emissaries that act as advisers to werewolf Packs, liaisons between them and humanity and she supposedly fulfills this role for the Alpha Pack. Marin was originally the Emissary for Deucalion's original Pack and was the only one spared when the Alphas killed off their Packs. In the episode "The Girl Who Knew Too Much", Scott confronts her asking her what Deucalion wants with him. Marin replies he wants to make a killer out of him, because if Scott kills someone he'll destroy his potential to be a True Alpha or have Scott join his Pack, either way Scott is eliminated as a threat to Deucalion. In "Alpha Pact", after the Darach is revealed to be Jennifer Blake, she is seen fleeing from the Alphas in the woods but protects herself with a mountain ash circle. They had suspected her to have had a role to play with the Darach. Marin confronts Deucalion over his ruthlessness in his goal to form his 'perfect pack', that she'd begun to try and stop him. Kali tells her they know she sent the mystery woman to save Isaac and had begun helping Scott and his friends find a way to stop Deucalion. Marin reveals the woman's name was Braeden, that she'd sent Braeden to do what Marin herself does, "maintain balance" and reveals to the other Alphas that Alan had actually saved Ennis, but Deucalion killed him and lied to them about it being Derek who'd killed him. She tries to tell Kali he intended for her to force Derek's decision to join the Pack, because that paves the way for Deucalion's plans for him and Scott. Deucalion states she's lying and injures her with his cane but Scott saves her and she tells him where they can find the location of the last Druid massacre, the Nemeton.

In Season 3B, Marin appears in "Echo House", as a counselor at Eichen House. She acts as Stiles's contact when he voluntarily checks himself in at the institution to prevent the Nogitsune from harming anyone. Marin leads group therapy, which includes Stiles and Malia, discussing the subject of guilt. Stiles and Malia both offer input on the feeling because of the Nogitsune possessing him and Malia over her changing on a full moon causing the death of her mother and little sister. Marin cuts the session short when she notices the electric burn marks on Stiles's neck, the site where Alan had injected the wolf lichen. Marin supplies Stiles with amphetamines to keep him awake as he needs to avoid sleeping when he'll be most vulnerable to the Nogitsune possession. Marin lets Stiles know if the burns disappear completely, the Nogitsune returns and Scott and Alan haven't found a cure by then, she will kill him by lethal injection to do what she does: "maintain the balance". Stiles understands and thanks her for the "illicit drugs". After the Nogitsune returns and escapes Eichen, Marin tells Malia where to find Scott so she can join in the hunt for Stiles.

In Season 2, he is first seen in episode "Ice Pick". Boyd becomes the third member of Derek's pack, completing the basic requirement for an actual werewolf pack. He joined so he wouldn't have to be the high school loner anymore. For most of the season, he was Derek's right-hand man and physically the strongest Beta werewolf of the pack. Derek treated Boyd distinctly differently from the way he treated Isaac and Erica. Isaac and Erica were sent in like attack dogs, while Derek held Boyd in reserve, as he was more mature and stronger than them. In "Party Guessed", he experiences his first full moon as a werewolf; he goes feral and almost gets loose but is subdued by a more successful Isaac. Boyd was close to Erica. They both became frightened of the Argents' vendetta, especially when the whole Pack had to go on the run and left Derek with her to find another pack at the end of Season 2. The pair are lead into a trap by the Argents using recorded wolf howls. Boyd saves Erica from being shot with an arrow by a vengeful Allison, but she relentlessly fires arrows into him, but Chris Argent shoots her bow away saving Boyd's life. After a short altercation with and capture by the Argents, Chris rebels against his family and sets them free. He and Erica attempt to flee Beacon Hills, but are trapped by the Alpha pack, leaving their fate uncertain.

In Season 3, it is revealed that Boyd and possibly Erica were alive and had been held captive by the Alpha pack for four months in the abandoned Beacon Hills First National Bank. During this four-month period, he and Erica had a heart-to-heart about them possibly becoming stronger during the lunar eclipse. Erica tried to fight back against the Alphas, but was killed. Boyd and Cora, Derek's younger sister who was also captured, were refrained from fully transforming during the full moons, by the hecatolite lined in the bank vault keeping the full moon from reaching them. This caused their rage and bloodlust to build up inside for months. He became friends with Cora over this experience. Upon being found by Derek and Scott, both of them lost all control and escaped into the woods to kill whomever they came across. They were later subdued by Derek, with assistance from Scott, Isaac and Chris Argent. Boyd re-joined Derek's Pack and returned to school still upset over the death of Erica. He participated in the battle against the Alpha pack, taking on Ennis with Cora, but is easily defeated by them. Knowing that Kali would eventually come to kill Derek to "avenge" Ennis' death, Boyd came up with a plan to weaken Kali using electrified water. The plan failed when the Alphas cut the power to the building. During Derek's fight with Kali, Boyd is held captive by Kali and she has the twins Ethan and Aiden hold Derek's claws upward. Kali then kills Boyd by impaling him upon Derek's claws, causing the latter to absorb Boyd's powers and see his memory of Erica's death, which shatters him. Dying, Boyd comforts Derek by telling him to not blame himself and that the sensation of the full moon was worth everything.

At the hospital after a seizure in "Ice Pick", Derek seduces her with the Bite, promising her that not only her epilepsy would go away, along with the side-effects, but she would become even better. Erica accepted the Bite, becoming a werewolf and the second member of Derek's Pack. She changed remarkably, her originally timid, self-conscious personality becoming more confident, snarky, flirtatious and stylish. She revealed that she used to have a huge crush on Stiles, but he never noticed her since he was "too busy" with his crush to Lydia. Erica was shown to be close to both Isaac and Boyd throughout the season, and repeatedly antagonized Allison. Erica had hit on Scott twice, hinting that she was attracted to him. She along with the rest of the Pack, attempted to stop the Kanima and goes rabid on her first full moon and has to be restrained by Derek. Near the end of Season 2, terrified of the Argents' werewolf genocide she and Boyd decide to leave Derek to find a new Pack, becoming Omega werewolves in the process, but are lead into a trap by the Argents. Erica is almost killed by a corrupted Allison, angry over her mother's death, but Boyd saves her life catching the arrow but is plummeted by multiple arrows from Allison. Erica hysterically begs Allison to stop when she readies a seventh shot, but Boyd is saved by Chris Argent. In the Season 2 finale, they were held hostage by Gerard, but were freed by Chris. While fleeing again, Erica and Boyd were trapped by the Alpha pack.

During Season 3, it is revealed that she and Boyd were held captive by the Alpha Pack in the abandoned Beacon Hills First National Bank. During captivity, she and Boyd had a heart-to-heart about them possibly becoming stronger during the lunar eclipse. Erica says she hopes it does, while looking at Kali with baleful eyes. Erica decides to fight, taking on Kali, but she dies from the fight in the process, reaching for Boyd her good friend, whispering his name with her last breath. Isaac later reveals that he found them and also Erica's body when being captured and escaping. After Derek finds Erica's body, he mourns her death and carries it out of the bank. Derek sees the circumstances of her death through Boyd's memories as he absorbs Boyd's powers, which shatters him emotionally.

Enrolling at Beacon Hills High in Season 3A, they repeatedly antagonize Isaac and Scott. Ethan is gay and begins pursuing Danny Mahealani, while Aiden begins a liaison with Lydia. Ethan and Aiden initially seduced Danny and Lydia respectively to try and get leverage and information on Scott and his allies, but Ethan's feelings for Danny eventually turn genuine. Aiden insists that his feelings for Lydia are fabricated, though they in fact run deeper than he would like to admit. Ethan's relationship with Danny softens the Alpha to the point where he meets Scott halfway in the episode "Currents" explaining he won't harm Danny, as he realizes that Danny isn't part of Scott's group but now knows that Lydia is. When the Alphas have Derek kill Boyd by hand as per Kali's order, Ethan shows guilt for his actions, which Scott catches onto. Having Lydia distract Aiden, Scott and Stiles confront Ethan for conformation concerning whether or not the Darach could have been an emissary to any one of them in "The Girl Who Knew Too Much". Ethan relays their story to them, explaining how they owe Deucalion and lets them know that Morrell, Deucalion's emissary, was the only emissary spared. Ethan betrays the Alpha Pack in the mid-Season 3 finale, "Lunar Ellipse", to help Derek and Cora escape from Kali, enlisting Lydia's help and Aiden is quick to join his brother turning on Kali when she threatens Lydia. Unexpectedly, this confrontation is interrupted by the arrival of Jennifer Blake, whom is the Darach. The twins fight Jennifer in separate one-on-one duels, but ultimately decide to merge into their super-werewolf form when they are overpowered and Kali is killed. Still they prove unsuccessful, when Jennifer snaps their merged form's neck and appear dead. Minutes later, they demerge as individuals, barely alive. Fortunately, Lydia and Cora get them to Deaton, who helps save their lives.

In Season 3B, they've lost their Alpha status and their talent to merge into their super-werewolf form in their feat to survive Jennifer's attack, so they disappear for a couple of weeks, with Ethan breaking up with Danny, though Lydia keeps in contact with Aiden. In "Galvanize", they say they need to join a new Pack as they are now Omegas and enemies will come for them because of their time with Deucalion. They come to ask Scott to join his Pack. Isaac and Stiles are vehemently against this and Scott says no as they don't trust them, particularly because of their part in Boyd's murder. Later, they decide to re-enroll in high school. Aiden continues his affair with Lydia but she eventually states that she helps to save lives, while all she sees is how he helped kill Boyd saying he's a 'bad guy' not just a 'bad boy'. Aiden shows genuine guilt for this. Ethan, meanwhile catches Danny making out with his ex-boyfriend and appears hurt. To make a fresh start and earn Scott's trust the twins help out with threats such as finding the serial killer William Barrow, combating the Oni, where they are both "tagged" by the said demons and helping out with the chaos caused by Stiles under the Nogitsune's possession. In the Season 3B finale, "The Divine Move" after events take a turn for the worse with Alison's death and the Nogitsune takes control of the Oni, the twins consider the idea to run. Derek scolds them and tells them they have to fight for Scott's cause of protecting people instead of fighting for Scott himself if they wish for redemption and become part of his pack. They assist Derek in fighting the Nogitsune and the Oni. After a prolonged altercation, they are saved by Chris Argent, who begins to destroy the Oni with Allison's silver-tipped arrows. Aiden destroys an Oni with a silver arrowhead, only to be fatally stabbed himself. Bleeding heavily and dying, Aiden is held in Derek's arms while Ethan cries over him. Aiden tearfully states that Lydia will have a hard time thinking he became a 'good guy', but Derek reassures he will tell her himself. After passing away, Aiden's death is "felt" by Lydia, which deeply saddens her. With the loss of his brother, Ethan decides to leave Beacon Hills. Danny breaks up with him instead and reveals that he knows Ethan is a werewolf, which shocks the latter. He then gives Ethan a kiss goodbye.

Ethan and Aiden had a talent to sense when the other is in pain and the power to physically merge their bodies into a single more powerful werewolf form. However, when Jennifer Blake killed their "super-wolf" form, their feat to survive as individuals cost them their Alpha status and that ability. Personality-wise, Ethan is calm, reserved, calculating, passive and shows remorse for his actions, as while Aiden was impulsive, aggressive, cocky, spontaneous and prone to violence. Both twins have a sense of honor as they followed Deucalion after he helped them fight back against their abusers in their original pack, and they both show guilt for their actions against Scott's circle of allies.

In the flashforward opener of Season 5, "Creatures of the Night", a traumatized Lydia, attempting to escape Eichen House, comes face-to-face with Aiden who says her treatment is not done. After she's restrained, Lydia tells him she knows he's not Aiden. "Aiden" is revealed to be a glamoured Dr. Valack.

In the episode "The Girl Who Knew Too Much", Jennifer is taking a class and sees Lydia drawing a tree. Later, she organizes the recital to honor the dead. Sheriff Stilinski simultaneously uncovers an old case about a patient who was brought to Beacon Hills Memorial years ago, but birds, similarly to the events in "Tattoo" died that day with Stilinski realizing the birds were sacrificing themselves for the girl - who he figures out to actually be Jennifer. Jennifer is revealed to be the Darach, the dark druid responsible for the mass sacrifices in Beacon Hills, tries to kill Lydia and kidnaps Stilinski. Using mistletoe Scott and Stiles prove to Derek she is the Darach in "The Overlooked", by exposing her true form. Derek angrily attacks her, but she reveals she's poisoned his sister Cora with the same plant and only she can heal her. As the Alpha pack try to kill her, she shows her intense hatred for them. She reveals to Derek her first name was Julia Baccari and she was Kali's Emissary. She and Kali were close, but Kali had attempted to kill her, as part of killing her entire Pack in order to join the Alpha pack. She was able to survive because Kali couldn't bring herself to deliver the final blow. Julia then struggled to the Nemeton, which hadn't had power for a long time. But the sacrifice of a virgin months earlier had given the tree stump a spark of power again, which gave Julia the ability to survive just long enough until help arrived. Eventually, because Kali's attack had left Julia hideously disfigured, she used her talents to disguise herself with a new identity, 'Jennifer Blake'. She informs him of her plan to destroy Deucalion's Alpha Pack on the next full moon which is also a lunar eclipse because werewolves lose all their power during the eclipse. Derek affirms this. She also tells him the virgin sacrificed at the Nemeton that reignited its power was Paige Krasikeva, his first love when Derek mercy-killed her, explaining her felt connection towards him. In "Alpha Pact", Jennifer holds Stiles' father, along with Scott's mother and Allison's father for the final sacrifice, Guardians, as they are all Guardians of their children. The behavior of the animals throughout the season is later discovered to have been caused by Jennifer in response to her and her mass sacrifices. She is also discovered to be aligned with the telluric currents as she committed her sacrifices in line with them. She's holding the captive parents at the Nemeton, the same tree in Lydia's been consistently drawing which is why Jennifer tried to kill her.

In "Lunar Ellipse", Jennifer appears at Derek's loft, breaking through the glass roof and takes on the Alpha Pack. She overpowers Kali and the twins. She angrily faces Kali, asking her what it takes for to look normal to spite Kali as she'd physically ruined her actual face. Jennifer demonstrates her power using telekinesis to have the glass shards rise and suspend. Kali stubbornly rages at her former friend and Jennifer ferociously rockets the glass shards into Kali's body, killing her former Alpha. The twins then take her on in their merged form but she snaps their neck inducing them into a coma. She uses Lydia to lure Derek back to his loft. She promises Derek the kidnapped parents if he will be her "Guardian", even after he informs her he's no longer an Alpha werewolf. Jennifer begins sacrificing the parents using the storm to bury them alive with her connection to the telluric currents. At the abandoned distillery outside of Beacon Hills, they face off against Deucalion who has Scott with him. Deucalion easily overpowers both of them, but, to buy more time, Scott blinds the "Demon Wolf" long enough for the lunar eclipse to arrive and the werewolves are rendered powerless. Jennifer assumes her true form and thrashes Deucalion. Derek convinces her to heal his blindness so he can see the results of his actions on her with the intent of him repenting her. However, this leaves Jennifer weakened as Derek had intended. Enraged, Jennifer repeatedly assaults Derek, but he endures her attacks just long enough for the lunar eclipse to pass. The lunar eclipse passes, but Jennifer protects herself with a mountain ash barrier, now fully intent on sacrificing the parents. To save them, Scott determinedly pushes through her barrier and eventually breaks it becoming a True Alpha. Scott says he'll kill her himself if she doesn't stop the storm, but Deucalion does it mortally wounding her. Jennifer survived Deucalion's slash to the throat, and was hoping the Nemeton would restore her health once more only to be stopped by Peter Hale. After revealing she knows all about his plan (killing Scott to steal his new Alpha status), Peter slashes her throat himself, killing her for good.

Jennifer was highly intelligent, specializing in literature and mythology, as expected of a druid Emissary. She had an intense hatred for Deucalion's Alpha pack, specifically Kali as she was friends with her and Kali tried to kill her and she stopped at nothing to get revenge on them, to the point of sacrificing innocent people. As the Darach, Jennifer was amongst the most powerful beings seen in the series because of her mass druid sacrifices. By massacring Warriors, she gained enhanced strength, Healers for healing abilities so great she healed Deucalion's eyesight, Philosophers for intelligence and strategy, and Virgins, to seduce people easily for her agenda as with Derek. She could use telekinesis, a form of mind control to have a pianist killed by a split random cord off the piano to slit her throat for her final Philosopher sacrifice, she could appear somewhere else partially or teleport completely as seen when Lydia saw her materialize in a blaze in "Motel California" and when she abducted victims. Overall, her most impressive ability was glamoring herself to hide in plain sight so efficiently she settled into her "Jennifer Blake" persona for the majority of the time fooling many people she was a harmless, innocent woman.

Cora became friends with Boyd during their imprisonment, but the hecatolite lined in the bank vault refracted the moonlight, refraining the two werewolves from fully transforming during the full moons, causing their rage and bloodlust to build up inside. Three months later, upon being found by Derek and Scott, Cora and Boyd lost all control of their animal sides and escaped into the woods to kill. They were later subdued by Derek, with assistance from Scott, Isaac and Chris Argent. Eventually the sun rises and she and Boyd are rescued and Cora is reunited with her brother joining his Pack. Cora is impulsive, trigger-happy, short tempered, vengeful and tomboyish but she cares for those close to her. Like her older brother Derek, she gives death threats to people; of course, like her older brother, she has no intention of going through with them. In "Currents", when Deaton is kidnapped to be sacrificed by the Darach, Cora helps Scott's friends to find him deducing that Deaton is being held in the same bank she was locked in for three months, but she learns the Alphas have attacked Derek's loft and sabotaged the trap for them. Cora leaves with Stiles and Lydia to help her brother. After Boyd is killed by the Alphas, she breaks down in tears and cradles her close friend's body. Cora tries to avenge his death by killing Aiden, but fails to do so and is knocked out when Aiden strikes her in the head with a weight. She is saved by Scott and Ethan when they restrain Aiden. Her wound from the blow to her head Aiden gave her suddenly doesn't heal, she falls unconscious and is put in the hospital. She was later revealed to have also been poisoned by Jennifer with mistletoe for leverage against Derek. Derek saves her life by giving up his Alpha werewolf status using his pain transference to heal her. In the mid-season 3 finale, Cora helps Lydia and Deaton save the lives of Aiden and Ethan after their defection from the Alpha Pack. She later leaves Beacon Hills with Derek for her former residence in South America.

During Season 3B, Cora goes into hiding at Derek's request, remaining in South America as he undertakes a mission to retrieve their mother Talia's claws from the Calavera hunters and they separate.

Braden's actions are revealed in the episodes "Chaos Rising", that the bruises she left on Allison and Lydia form the logo for the abandoned Beacon Hills First National Bank where the Alpha pack is holding Boyd and Cora hostage and "Currents", that her words regarding Scott was that he had the potential to be a True Alpha and was intending to warn him about the Alpha Pack and Deucalion's plan for him. Her identity remained unknown until "Alpha Pact" when the Alpha Pack confront Marin Morrell that she sent her in a move against them. Morrell reveals she sent Braeden to rescue Isaac from the Alphas, to ensure balance. In "More Bad Than Good", it is discovered Braeden is actually alive, but scarred on her face and neck from Deucalion's claws. She rescues Derek and Peter from the Calavera werewolf hunters and helps them retrieve the triskele urn in the hunter's possession. She reveals she was hired by Deucalion to save them. While Braeden is shown to be fearless, spontaneous and altruistic, it's explained she is a mercenary for hire, taking dangerous jobs from anyone who can pay her, regardless of her client's intentions or identity, or the moral compunctions of her missions.

Braeden appears in "The Dark Moon" in Season 4, being provided by Araya Calavera as a guide to Scott's Pack during their mission in Mexico to find Derek. She's taken a contract from the Calaveras to find Kate, capture her and return her to them. Scott asks her if she'd kill Kate if paid enough. She replies if paid enough, she'd kill Scott himself. In "Muted", Braeden arrives in Beacon Hills in her US Marshall pose, where Derek hires her to find Kate for him first so he may learn what Kate did to him, causing his werewolf eye color to return to gold. While she accepts, the two develop an attraction to each other. Braeden is found wounded, shot by an assassin, in the Preserve at Lookout Point by Derek where he was trying to track down the Pack led by the Alpha Satomi. He brings her to the hospital where she informs Derek and Melissa that the dead werewolves she found were infected by a virus lethal to supernaturals. She catches Derek watching over her, he claims to be "protecting his investment." Recovering in "Time of Death", Braeden crashes at Derek's loft, continuing their interest in one another. When Derek reveals he's gradually losing his power, Braeden takes Derek under her wing to teach him how to fight supernaturals as a human, beginning with firearms. They wind up sleeping with each other, starting a relationship. In "Perishable", Braeden interrogates the incarcerated Haige after he tried to assassinate Parrish. She learns of the plan to assassinate Scott's Pack at the school bonfire. With her lessons for Derek in hand-to-hand combat and firearms paying off, both are able to fight off the assassins both at the school, saving Scott, Malia and Liam's lives, and at the Argent Arms International warehouse when protecting Satomi's Pack. In the Season 4 finale, Braeden and Derek gear up to hunt down Kate in Mexico after she abducts Scott and Kira. Braeden tells Derek she's not accepting that Derek may not come back alive after he confides in her, sharing a sweet kiss with him. At La Iglesia, Braeden fights off Kate and a Berserker. She is saddened when Derek supposedly dies, though she keeps on fighting. She is elated when he's actually alive from the process of evolving. At the end of Season 4, Braeden relays to Derek her employment as a US Marshall ended as she'd spent her entire career tracking a single target: The Desert Wolf. The two of them leave Beacon Hills afterwards.

In Season 5, Braeden keeps in touch with Scott's Pack sending them intel she finds on the Desert Wolf. In "Status Asthmaticus", Braeden returns to Beacon Hills, assisting Malia against a Chimera. She's been in contact with Malia, in on her plan to kill the Desert Wolf. Braeden informs Malia that the Desert Wolf is coming to Beacon Hills for her. The twosome begin tracking associates of the assassin. In "The Sword and the Spirit", Theo volunteers his assistance to the duo, but Braeden is affronted by Theo's attempt to kill Scott and his treachery.

With the help of Deaton, Deucalion's eyes healed physically, but his sight didn't return. This discovery coupled with Gerard's betrayal enraged Deucalion. Marco, another of his beta werewolves, took this opportunity to try and kill Deucalion to become the Alpha of their pack. Deucalion, however, realized he could see using his werewolf vision and savagely killed Marco in retaliation. In doing so he realized Alphas became stronger when they kill their own Betas. The entire experience corrupted Deucalion. Eventually, he killed the rest of his pack to add all of their powers to his own and lead fellow Alphas Kali and Ennis to do the same. Sometime after, he came across the twins (Aiden and Ethan) who were "the bitches" in a brutal Pack. Deucalion taught them how to control their merged form to fight back against their abusers and they joined him after killing their original Alpha. He pulled all five of them together to form an Alpha pack. He even had all the members kill their Emissaries, except for Marin, his own. Deucalion eventually came to be known as "the Demon Wolf".

Deucalion's Alpha Pack arrived in Beacon Hills in the Season 2 finale, capturing Boyd and Erica in the process. In "Unleashed", Deucalion goes to Derek's loft along with Kali and Ennis to offer Derek a proposition for Derek to kill his own Pack to join his own with the intention of recruiting him. Deucalion's actual plan for Derek was to place him against Scott. To this end, after the battle between the Packs in "Frayed", Deucalion kills Ennis after he fails to heal himself, absorbing Ennis' power; he lies to Kali and the twins that Ennis died of his wounds, intending to have a vengeful, distraught Kali force Derek's decision to join the Alpha Pack. In "Currents", the reason for this is because Deucalion knows that Scott has the potential to become a True Alpha and wants to recruit Scott, not Derek. Deucalion's true intentions throughout Season 3 were to push Scott into a position to either join the Alpha Pack or have Scott kill somebody, destroying his True Alpha potential and eliminating Scott as a potential threat to him. He had Ethan and Aiden enroll in high school to seduce people close to Scott for leverage. When the new killer committing human sacrifices is revealed to be a Darach, Deucalion had his pack hunt it down. He targets the Darach because it used to be a druid who can call upon powers from sacrifices. After finding out that the Darach is Jennifer, Kali's old emissary, the Alpha Pack leader tried to have her killed. Scott later tearfully joins Deucalion's pack in "The Overlooked" in return for Deucalion's offer to help look for his kidnapped mother. In "Alpha Pact", he tries to have Marin killed when he suspects her to have had a role with the human sacrifices and she confirms to have had been working against him to "maintain balance", but Scott ultimately saves her. In "Lunar Ellipse", Deucalion and Scott face off against Jennifer and Derek (who Jennifer forced into helping him). Deucalion shifts into his Demon Wolf persona and overpowers both of them easily. He then tries to force Scott into killing Jennifer to become an Alpha, but Scott blinds him using flash bolts as he can see as a wolf. During the lunar eclipse, Deucalion temporarily loses his powers and Jennifer is to be able to defeat him. After being beaten to a pulp, Jennifer is tricked by Derek into healing Deucalion's normal eyesight to allow him to see her face and the result of his crimes on her but Jennifer is weakened because of this. After the lunar eclipse passes, Deucalion is in awe as Scott awakens his True Alpha abilities, breaking through Jennifer's mountain ash barrier. Deucalion saves Scott from becoming a killer by mortally wounding Jennifer, slashing her throat, subsequently stopping her from sacrificing the kidnapped parents. Because of this, Derek and Scott decide to let Deucalion go, hoping he can be the man he once was before. They warn him, if he commits something they don't like, he'll never see them coming.

In Season 3B episode, "More Bad than Good", Braeden reveals Deucalion had hired her to rescue Derek from the Calavera werewolf hunters.

In Season 5, "The Sword and the Spirit", Deucalion is held hostage by Theo's Chimera Pack after some pain on their part. Deucalion is blind again as it's revealed Jennifer's magically healing his eyesight was only temporary. The demonic Alpha tells Theo he's aware of the Beast of Gévaudan which has been resurrected by the Dread Doctors and also that Theo wants the werewolf to show him how to steal its power. In exchange, Deucalion says that he only wants on thing in return and that's Scott's eyes on the tips of his claws.

Originally, Deucalion was described as a "man of vision" in the past, a level-headed, reasonable person as an Alpha, the leader of his Pack with a belief and faith in humanity. He was changed by Gerard Argent's treachery, the loss of his sight and his subsuming the powers of his Pack members by killing them. Nowadays, Deucalion is sociopathic, obsessive, vain, charismatic, power-hungry, willing to kill anyone who gets in his way, and not above killing members of his own, if they are useless to him. Deucalion possesses abilities greater than that of an average Alpha werewolf; he is able to command a Pack of exceptionally powerful Alphas with both fear and respect. Unlike most werewolves, in his transformed state, Deucalion's skin turns dark blue/grey and his facial features appears more demonic than wolf-like.

In the episode "The Overlooked", when the Alpha pack began hunting the Darach which is actually Jennifer, it's revealed she is really Julia Baccari, Kali's former Emissary. When Deucalion confronted her, Kali admitted she'd attempted to kill Julia, as part of killing her entire Pack in order to join the Alpha Pack, but she'd loved Julia and was unable to do it in the end and left her to die. Kali felt genuine remorse for this. The Alphas attempted to kill Jennifer, but were foiled by Scott and his allies. In the mid-season finale, she and Aiden show up at Derek's loft to kill Derek, only to have their plans foiled by Ethan - who betrayed them. Kali demands to know where Derek is. Aiden is quick to join his brother after she threatens Lydia. Kali confronts Aiden over his loyalties when he becomes violent in his supposed defection. However, this turn of events is interrupted by Jennifer, who breaks into the loft through the glass roof. Kali takes her on, but is overpowered. Jennifer confronts Kali about her new glamoured form, asking her what it takes to be able to look normal to spite Kali as the malicious Alpha had ruined her real face when she'd attempted to kill her. Kali fires back saying she doesn't care, but Jennifer responds saying "it takes power. Power like this", and uses telekinesis to levitate shards of the broken glass off the floor. Kali shows fear at this display, but ultimately refused to back down in arrogance and screams she "should've ripped (Julia's) head off", and Jennifer fires the glass shards into Kali's body, violently killing her.

In the Season 3 premiere, "Tattoo" Ennis first appears disguised as a hospital orderly and tried to kidnap Isaac at the hospital, only to be stopped by Derek and Scott. After breaking into Derek's loft, Ennis easily subdued Cora while Deucalion explained his proposition to Derek about joining their pack. During the Alpha pack's battle against Derek's pack in "Frayed", Ennis was severely injured by Derek and Scott, which caused Kali and Aiden, along with their Emissary, Marin Morrell, to seek out Alan Deaton for help. Alan saves his life, but Deucalion kills Ennis to absorb his powers after he couldn't heal himself. The Alpha pack leader lies to Kali and the twins that Ennis had actually died from his fight with Derek. The Alpha pack declares that Derek must now either be killed or he is to join their Pack in repentance for Ennis' death, as per their rules. Marin tries to let the Alphas know Deucalion had actually killed Ennis intending to have Kali force Derek's decision to further Deucalion's plans for Derek and Scott, but he states she's lying and Kali came for Derek anyway.

Ennis was the largest member of the Alpha pack and a force of pure brutality. His brute strength and fighting knowledge made him a deadly adversary in a fight. He was arrogant, brutal and made rather zealous, amoral actions as an Alpha werewolf, declaring revenge on the Argents for their killing his dangerous Beta and Biting Paige. He was also quite murderous, killing his entire Pack and Emissary to absorb all their power. It's shown that he and Kali were involved with each other and that he followed Deucalion which is why Kali joined, according to Deucalion.

During Season 3B, Rafael begins having Sheriff Stilinski's cases forwarded to him. As many of these are unclosed and unresolved (due to the Sheriff's new found knowledge of the supernatural), and inspecting Stilinski's reopening of the Malia Tate case, he starts to have Stilinski impeached, which would have him fired, much to Scott and Melissa's anger. Stiles coldly lets Rafael know that his attitude towards his father is because of something else rather than his "professional disapproval" of Stilinski, something Rafael doesn't like Stilinski knowing and Stiles says he knows what it is. When Stiles goes missing while sleepwalking in "Riddled", Rafael picks up on a line from Stiles' phone message to Scott and correctly deduces Stiles is sleepwalking, had called Scott while still asleep and is unknowingly at the werecoyote's den. Stilinski puts aside his differences with Rafael when he finds Stiles and brings him to the hospital, shaking his hand. When Stilinski faces the impeachment case in "De-Void", Rafael helps to talk him out of the case, revealing to him the real reason he came was to have an excuse to stay so he could talk to Scott. In "Insatiable", Rafael reveals to Scott why he left. He used to drink heavily back when he and Melissa were still married. One time, Rafael had come home drunk and was holding Scott when Scott was little. He'd got into a fight with Melissa, but he'd caused Scott to fall down the stairs, bruising his head on the floor which led to Melissa screaming at him to get out. Rafael left the family the next day, divorced Melissa and never took another drink again. Rafael later learned Melissa had confided in Stilinski over his drinking over the phone; Stiles had overheard the conversation and Rafael became spiteful toward Stilinski due to his alcoholism when his wife Claudia died. Scott isn't satisfied with his explanation, telling Rafael he used to "get hurt all the time" and that Rafael was never there for him. In "The Divine Move", Rafael talks to Melissa, consider returning to San Francisco. Melissa snaps at him, telling him when she yelled at him to "get out" after the incident, she was telling 'a drunk to get out of the house', not telling a father to get out of his son's life. Rafael helps to save Melissa when the Oni attack the hospital, promising Melissa that he'll do his best to make things up to Scott.

In Season 4, Rafael is staying at the McCall house, to repair things with Melissa and Scott because he's "keeping (his) promises this time." In "Orphaned", Rafael is able to identify the supposed freshmen Garrett and Violet that have been killing supernatural people in Beacon Hills as the assassins, 'the Orphans' from Violet's weapon, the thermal cut wire. Rafael and Stilinski oversee Violet's transport to a federal facility, but the transport is attacked by Kate Argent, though they survive. During the school's quarantine in "Weaponized", Rafael investigates the situation. He enters the school disguised as a CDC worker after receiving a call from Melissa about a cure for the virus which will save Scott and his friends. He comes upon the assassin 'the Chemist' about to execute Stiles. Rafael takes out his gun and kills 'the Chemist' to save Stiles. In "Time of Death", Rafael has to leave for San Francisco to report to his superiors about his shooting the assassin. Scott asks him has he killed before, he replies two other times and lets his son know it's not easy, taking a life. Scott gives him a hug, but the conversation causes Scott to subconsciously debate should he resort to killing his enemies in order to stop them. Before Rafael departs, he tells Scott he's noticed the strange behavior of Scott and his friends. Particularly how they handle the situations happening in Beacon Hills, that they're far too calm for the horrible things that keep happening to them. He tells a nervous Scott he wants a talk with him that he wants "to be in the know" when he returns.

Noshiko is first seen in "Galvanize" when Scott is invited over for a sushi dinner with the family after Scott and Kira develop an interest in each other. Noshiko tells Scott some of their family history. In "Riddled", Noshiko unintentionally displays talents similar to Kira's which Kira catches. Noshiko later appears at the hospital during the power surge. She faces off against the Nogitsune, whom is possessing Stiles Stilinski, with two of the Oni by her side. She and the Nogitsune trade words letting him know she will be undeterred in eliminating the Dark Kitsune, even if his chosen host is an innocent. Later, Noshiko sees Kira manifest her Foxfire defusing a sabotaged electrical cable, subsequently leaving Kira all the more suspicious. In "Letharia Vulpina", Noshiko meets with Ken, where he hands her a fake book containing blades, unaware that Kira is spying on them. It's realized that Noshiko is who summoned the Oni to Beacon Hills. The blades she carries, represent her Kitsune Tails. By sacrificing a Tail, a respective Oni is summoned from the Nemeton, and she can command the demons. Noshiko is adamant that Stiles be killed to eliminate the Nogitsune. In "The Fox and the Wolf", Scott and Kira object to her saying they want to save Stiles instead and implore her to call off the Oni. Noshiko reveals her story to her daughter and Scott, that she is responsible for unleashing the Nogitsune, saying he "came from (her)".

In 1943, Noshiko was living in a "relocation camp" called Camp Oak Creek under Executive Order 9066. Noshiko would subtly improve the lives of the interned Japanese Americans by stealing food and supplies, all the while engaged in a clandestine romance with a field medic, Corporal Rhys. During an outbreak of pneumonia, Noshiko and Rhys discovered that the camp's army medics were selling medical supplies on the black market, resulting in several deaths in the camp. Noshiko hastily told her fellow interns of her discovery, but this unintentionally incited a riot. Rhys had attempted to defuse the chaos but was set aflame by a cocktail from an intern, Satomi, who Noshiko realized too late was a Bitten werewolf, and he died in agony. Eventually the officers opened fire and multiple innocents were put down. Noshiko was shot also, but survived with her body healing. She learned the entire incident was going to be covered up. Enraged the army medics were going to get away with mass murder, as well as distraught with Rhys' death. Out of injustice, Noshiko prayed for her ancestors to send a Nogitsune to punish those responsible for the massacre, intending for the Dark Kitsune to possess her, for her pain and misery to imbue him with power. But a Kitsune cannot be controlled. So being a trickster, the Nogitsune possessed Rhys' corpse instead. He proceeded to slaughter not only the officers, but the interns at Eichen House when the inhabitants relocated there. Realizing her great mistake, Noshiko eventually cornered the Nogitsune and, with some help from Satomi, slew him. Noshiko had buried the fly from the corpse which embodied the Nogitsune's very being underneath the Nemeton. The Yukimuras had relocated to Beacon Hills because the ritual Allison, Stiles and Scott undertook released the Kitsune from its prison.

Later, Noshiko visits Rhys' grave in Eichen House's basement in "De-Void". It is revealed she had carved the kanji "self" into the board to signify that Rhys had died as himself, not as a monster when the Nogitsune possessed him. The Nogitsune corners her and he steals her last Kitsune Tail from her. In "Insatiable", Noshiko and the Oni arrive at Camp Oak Creek to slay the Nogitsune. She confronts Kira's protesting that she thinks he could be taken alive, saying that she tried to save Rhys seventy years ago, saying Stiles is gone. She admits that while she is indeed no longer the Fox because of the sacrifice of her Tails, her daughter is, but the Nogitsune is still her demon to bury. Unfortunately, the Void Kitsune, takes control of the Oni using her final Tail and he turns the demons against the group and Allison is killed. With the Oni taken from her control, Noshiko takes Stiles and Kira back to their home. The stakes having been raised, Kira asks her mom if the Nogitsune could be trapped again. Noshiko replies the Nemeton's power is what trapped the Void kitsune. At the end of Season 3B, the Nogitsune is imprisoned in the Hales' triskele urn, and Noshiko feels at rest now that her enemy has been put away.

In Season 4, during the Dead Pool situation, in "Time of Death", Noshiko shows Kira how to use her Thunder Foxfire to incapacitate Scott into a vegetative as part of a plan to catch the Benefactor. She advises Scott he'll experience dreams and whether they're good or bad depends on him. When Melissa snaps, asking why they're letting their kids fight these fights, Noshiko advises her saying they'd be telling them to run and hide for the rest of their lives otherwise. In "Smoke and Mirrors", Kira hallucinates Noshiko in La Iglesia when she and Scott are abducted by Kate Argent, comforting her after Scott tried to kill her as a Berserker and teaching her how to trigger a Kitsune's healing, using pain from cutting herself using a piece of obsidian. Back in Beacon Hills, Noshiko presents Kira with the obsidian piece shaped into a shuriken. Kira figures out the shuriken represents her first Kitsune Tail with her mother smiling in pride. In Season 5, the Yukimuras return from a summer in New York and arrive back during a traffic jam on route 115. Noshiko and Ken tell Kira of a legend for a similar storm; the Wild Hunt. In "Strange Frequencies", Noshiko engages Kira in a surprise spar, during which Noshiko speaks out in Japanese to Kira, saying "Show yourself, Kitsune!" Kira promptly flies into a rage, her Fox aura taking control of her. Kira moves in to kill her mom, but Ken snaps Kira out of her rage using her shuriken Kitsune Tail. Her worries confirmed, Noshiko informs a horrified Kira her Fox spirit is vying for control. At home, Noshiko attempts to help her daughter regain control of her power using acupuncture. Unfortunately, she and Ken later see that Kira has involuntarily escaped into the night, and then that Kira's sword was found embedded in a deceased Chimera. Noshiko, enlightened, helps a frustrated Kira to read Valack's coded novel which uncovers suppressed memories. The elder kitsune advises Kira she can't read the novel because the story is confusing her Fox spirit. To solve this issue, Kira should read the book, but without following the story: read the book backwards. Kira succeeds, remembering the Dread Doctors experimented on her the night of the traffic jam. The Yukimuras leave Beacon Hills for answers so to tame Kira's Fox spirit.

At school in Season 3 "Anchors, Ken regularly unintentionally embarrasses Kira by trying to help her make friends. He spills the fact that Kira has a crush on Scott, right in front of Scott himself. He attempts to help, culminating in inviting Scott over for a sushi dinner with their family in "Galvanize". He and Noshiko tell Scott some of their family history. In spite of his name, Ken is Korean, having married Noshiko in Japan, but taking her last name, as Japanese law requires that the couple must take the same last name to belong to the same Koseki (family registry). Ken affirms to Scott he was proud to join his wife's family, given her family's long and storied history which is famous in Japan. In "Riddled", Allison and Isaac come to him for help in translating a strange Japanese voicemails on Allison's phone from a mysterious unknown caller. He says the voice is instructing Japanese-Americans at an American internment camp named Camp Oak Creek during WWII. He tells them the message is fake as he says no such camp existed in California. In "Letharia Vulpina", it's revealed Ken is supernaturally aware, and Noshiko is a kitsune.

During the bomb scare at the school, Ken meets with Noshiko discreetly. Ken hands Noshiko her Kitsune Tails, concealed in a fake book. He implores his wife to talk with Kira, after what happened at the hospital. In "The Fox and the Wolf", the Nogitsune, inhabiting Stiles' body, enters Ken's classroom, looking for Noshiko's Tails. The Dark kitsune infects Ken with one of its flies to possess him to have him reveal where the Tails are. He is saved by Noshiko using a remedy brought to them by Kira and Scott, to expel the fly. When Noshiko reveals her story concerning the Nogitsune, Ken admits he lied to Isaac and Allison about Camp Oak Creek existing because of the Argent family's history of violence, unsure if he could trust Allison. Ken reveals he'd met Noshiko during his time in grad school when he'd searched for the confirmation of Camp Oak Creek's existence. He convinces his wife to share details with Scott, not just with Kira, saying allies should be welcome in times of war. Scott confronts Ken over his supporting Noshiko's demand that Stiles be killed to destroy the Nogitsune. Ken placates the young Alpha, saying that Stiles is gone and because of the bloodbath caused by the Nogitsune in 1943, he says sometimes "history does repeat itself" and life can conspire against people. In "Insatiable", when Kira is stressing about recent events and the secrets she's learned, Ken comforts and advises his daughter, saying as a Kitsune, she has a lot to learn, specifically the game of Go in order to combat the Nogitsune, known as Baduk in his native Korea. In the Season 3 finale, when Kira and Stiles take refuge at their home, Kira asks what their move is now that Nogitsune has split from Stiles' body and has taken control of the Oni. Ken says that at this point, to turn the game around against the Dark Kitsune, they need a divine move. After the Nogitsune is imprisoned, Ken and Noshiko correspondingly put away the Go pieces, as "the game" has been won.

In Season 4, Ken remains on the school staff as the History teacher. In "I.E.D.", Ken confronts Kira, asking her if there was something she wanted tell he and Noshiko about. Kira promptly apologizes to him over not telling them about the Dead Pool and the assassins. Ken dumbfounded says he was talking about her joining the lacrosse team. He and Noshiko are let in on the situation when both Kira and Noshiko are revealed on the hit list. In "Weaponized", during another assassination attempt, Ken helps his daughter and the Pack locate a second entrance to the Hale Vault so they can hide when they lose control of their powers during the virus out break. In "Smoke and Mirrors", Ken has Kira's obsidian piece which she used to trigger her healing at La Iglesia reshaped as a shuriken as it represents Kira's first Kitsune Tail, similar to how Kaiken blades represented those of his wife. In the Season 5 premiere, after a summer in New York Ken has forged Kira a new katana blade that can be fashioned as a belt. He starts giving Malia driving lessons. In "Strange Frequencies" Ken volunteers Kira to help him with school supplies on a Saturday, though it's a ruse by he and Noshiko to lure Kira into an elaborate Kitsune training session. Kira's Kitsune spirit takes control of her, and she moves in to kill Noshiko. Ken snaps her out of her rage by embedding her shuriken Tail into his desk. Noshiko attempts to assist Kira in bringing the sway of her power back to her human side, but she and Ken see their daughter has left into the night, going into a fugue state. In "Ouroboros", when Kira's sword is found in the corpse of a Chimera girl and Kira is arrested, Ken confesses to the crime and that the sword is his so to protect Kira. Ken is let go when the corpse is stolen.

Parrish makes his first appearance when Stiles goes missing in "Riddled". In "Letharia Vulpina", Parrish operated on the suspected bomb disguised as a birthday present left on the school bus, to determine if it was a bomb. He manages to distract the student Jared, the one holding the potential explosive while he was opening it with an amical chat to ease Jared and take his mind off of the present danger. In "Insatiable", Stilinski tells Parrish he is a comfort to be around and asks why he'd transfer. Parrish responds that he transferred to Beacon Hills because he felt drawn there, thinking he needed a change of space. In the Season 3 finale, Parrish and Stilinski are attacked at the Sheriff's station by the Oni, slashed by their blades, slowly killing them, but are cured when the Oni are destroyed.

In Season 4 episode "Muted", Parrish investigates the Walcott family murder where he comes across Lydia, who's drawn to the site because of her banshee ability. Parrish lets her know of her reputation of being present at scenes where dead bodies turn up. He unwittingly asks her if she's psychic. Lydia scoffs at Parrish asking if he believes in things like that. Parrish replies he keeps an open mind. In "The Benefactor" Parrish, using his military background, helps Stilinski and Derek in analyzing the Mute's motorized keypad, uncovering the fact that the Mute is an assassin and disarming the claymore mine planted at the school. In "I.E.D." Parrish brings Meredith to the sheriff's station and later helps her recite numbers which are a clue to the second third of the Dead Pool. Lydia later sees his name on the list. She and Stiles show him the Dead Pool in "Orphaned". He asks them why would he be on the list which they deflect for the time being. In "Perishable", an assassination is attempted on Parrish. The culprit is his fellow deputy Haige. Haige soaks Parrish in gasoline and sets him on fire. His car and clothes burn, but his confirmed supernatural status manifests: he survives, totally unharmed with no residual burns at all. Parrish walks into the sheriff's station, and brutally attacks Haige, beating his would-be killer to a pulp. After the entire ordeal, he is brought to Derek's loft by Lydia and meets with Scott, Derek and Lydia. The three subsequently let Parrish in on the supernatural circle. He comes to grips with what they tell him, though they can't identify his species.

Newly enlightened on the Dead Pool situation, Parrish helps Lydia and Stiles with the list of names Lorraine Martin left Lydia. They were all supposedly suicides committed at Eichen House, but Parrish later notices each suicide was reported by the same person: Brunski. Parrish arrives at the institution just in time to save Lydia from being killed by Brunski, shooting him dead. Parrish, tracking Peter Hale in "A Promise to the Dead", arrives in the sewers and attempts to free Chris Argent from being pegged to the wall. Parrish tells Chris he needs adrenaline, and he can get it using anger, and entices the older man to use anger over what Allison would feel if Scott were in danger, and while pulling the rebar again, Parrish's supernatural status inconspicuously triggers again, his eyes glowing a fiery orange. In "Smoke and Mirrors", Parrish accompanies Chris to Mexico to rescue the Pack from Kate. At the conclusion of Season 4, Lydia gives Parrish a copy of the bestiary and offers him her help to find out what his supernatural identity is. In the Season 5 premiere, Parrish investigates a noise complaint, but winds up being attacked by a mutated werewolf, but heals with his wounds giving off smoke. For the past six months, Parrish has been sporadically dreaming of the Nemeton, where he's carrying corpses to the tree stump. In "Condition Terminal", Parrish gives Lydia hand-to-hand lessons from his time in the Army. When the Chimeras appear, and as they're killed off, Parrish unconsciously goes into trances, his status activating, where he steals their bodies and places them at the Nemeton, (which has been supernaturally concealed to everyone but him) the scene in his dreams playing out. Parrish, in one of his trances, flips over Stiles' jeep, and attacks fellow deputies guarding one of the corpses. In "Lies of Omission", Parrish succeeds in consciously activating his powers by Lydia's intervention. Once he's told of his actions, Parrish has himself incarcerated in a jail cell to protect the people around him, telling Stilinski he's dangerous. However, in "Status Asthmaticus", his powers activate again and he easily escapes the cell to collect the remaining corpses. Lydia simultaneously uncovers his identity: he protects the supernatural world and is a Bearer of Death; the hellhound. In "The Last Chimera", Jordan finds Lydia after she's rendered catatonic by Theo.

The Nogitsune first appears to Stiles in a mental apparition in "Riddled". Stiles is sleepwalking, but in reality Stiles does not know he is actually still asleep. Stiles sees himself in a basement with the kanji "己" carved on a wall. The Nogitsune appears as a bandaged humanoid wearing an over-worn leather bomb jacket. The Void Kitsune haunts Stiles referring to himself (along with Stiles) as "we". The Nogitsune riddles Stiles with the question, "Everyone has it, but no one can lose it. What is it?" Stiles eventually wakes up and the Nogitsune, inhabiting his mind, vanishes. When Stiles loses consciousness during his MRI test for frontotemporal dementia, the same disease that killed his mother, the Nogitsune appears again in Stiles' mental visions. Stiles solves the riddle: a shadow. The Nogitsune removes the bandages from his body revealing Stiles' face: the Void kitsune has taken on Stiles' form as his 'shadow'. He instantly takes control of Stiles' body. The Void Kitsune causes utter chaos, arranging for traps, attacks to happen which kill multiple innocents including a sabotaged electrical cable at Beacon Hills Memorial hospital, which induces Isaac into a coma, a bomb scare at the high school but the real bomb going off at the Sheriff's department. The Nogitsune employed absolute trickery, taunting Stiles' loved ones as his MRI test results displaying positive signs of the disease were fake, he was a master at Machiavellian schemes, at one point tricking Scott into thinking Stiles had broken free of his possession, enlisting Scott to siphon away the victim's pain from the very traps he'd set so he could absorb all the collected pain from Scott's body to grow stronger and maneuvering Stiles' friends to use as bodyguards from the Oni.

In the episode, "The Fox and the Wolf", it is revealed Noshiko Yukimura had summoned the Nogitsune in the first place back in 1943. Noshiko had wanted him to possess her to seek vengeance upon the corrupt army medics that had caused a manslaughter at Camp Oak Creek, by selling medical supplies for her fellow interns on the black market and the death of her lover Corporal Rhys. She wanted her pain and tragic experience to imbue the Void Kitsune spirit with power. Only the trickster, once it was unleashed from Noshiko's prayers to her ancestors, he instead possessed the bandaged corpse of Rhys because a Kitsune cannot be controlled. The Nogitsune had unleashed his horror causing a bloodbath at the Eichen House institution where the interns had been relocated which Noshiko had never intended to happen. She eventually cornered him and with some help from her werewolf friend, Satomi, slew the Nogitsune. But because the Void Kitsune could not be killed, his very essence, embodied in the form of a fly, left Rhys' corpse, was captured by Noshiko and buried beneath the magical tree, the Nemeton, just outside Beacon Hills. He laid there dormant for the next seventy years, but the sacrifice undertaken by Stiles, Scott and Allison had released him from his prison.

The Nogitsune corners Noshiko Yukimura in the basement of Eichen House in "De-Void" where he steals Noshiko's last Kitsune Tail from her, her last remaining kaiken and cuts open Stiles' stomach which releases a stream of flies from Stiles' body. These flies infect and possess Derek, Isaac and the twins causing them to go feral, endangering their lives and others. The Void Kitsune is eventually subdued with Deaton drugging Stiles' body with Kanima venom. As assessed by Peter Hale, Stiles is in a battle for control of his mind; the Nogitsune has maintained his grip on Stiles body by playing an endless game of Go with Stiles as Rhys' corpse atop the Nemeton within Stiles' subconscious. Scott uses an Alpha's ability to meld Stiles' mind with his and Lydia's to free Stiles from the Dark influence. Scott uses an Alpha's roar while present in Stiles' head and Stiles tips over the Go board and breaks free of the Nogitsune. This process splits Stiles from the Nogitsune, Stiles is free and the infected werewolves are cured of their possession. But the Void Kitsune now exists in real time as a copy of Stiles' shape and takes Lydia hostage.

The Nogitsune holds Lydia at the abandoned Camp Oak Creek. He taunts her telling her that Stiles is dying and he is growing stronger. Lydia senses the Void Kitsune's impending death at the hands of the Oni, but he had kidnapped Lydia just for the very purpose of knowing in advance when the Oni would be close enough to him. When the demons appear, he takes Noshiko's last Tail and snaps it with the Oni so close to him that the control of the Oni is transferred from Noshiko to him. The Nogitsune then unleashes the Oni upon the group, though he and his new minions retreat after one Oni is destroyed and another succeeds in killing Allison. In the Season 3 finale episode "The Divine Move", the Nogitsune, with the Oni still under his control, enters the final stages of his plan of destruction by unleashing the demons all over Beacon Hills; with each person dying as a result of being cut by their blades. Led by Scott, the entire group make one last stand against the Void Kitsune and his forces, intent on trapping him within the triskele urn that contained Talia Hale's claws, as its wood was made from the Nemeton, the very power that kept him trapped before. When Scott, Kira, Stiles, and Lydia face off against the Nogitsune at the school, the Dark Kitsune informs them that the only way to stop the chaos is for Scott to kill Stiles (comparing the young Alpha and his best friend respectively to a kaishakunin and a samurai) in a Seppuku ritual. When Stiles feels he has no other choice, he grabs Kira's dropped katana and starts to kill himself to end the strife, but then figures out that everything that is happening around him and his friends is an illusion, which they break. The Nogitsune, angered that his "game" has been ruined by the destruction of the Oni and by Stiles' divine move, attempts to kill his host. He advances on Stiles and Lydia raging, "I'm a 1000 years old! You can't kill me!" Stiles and Lydia tell the Kitsune they can change him instead by changing the body of his host's copy. Stiles tells his foe he "can't be a Fox and a Wolf" moments before Scott Bites him, turning him and Kira stabs him with her sword. The Nogitsune loses his power, his Stiles shape which collapses and dissipates like dry clay, reverts to the form of a fly, and Isaac seals him in the triskele urn, putting an end to his threat.

Meredith first appears in Season 3 episode "Echo House", when Stiles is checked in at the institution. Stiles comes up behind her when Meredith is concernedly talking on a disconnected, inactive phone saying she should "tell them" and that "one of them is standing right behind me", which Stiles overhears. In "Insatiable", the Pack deduct Meredith is another banshee by comparing her symptoms to Lydia's. Meredith escapes and breaks into the school but is saved by the Pack before she is attacked and returned to the hospital by Brunski. Scott, Stiles and Isaac take her to Scott's house. They're hoping she can help them find Lydia. Meredith remembers Lydia as "the red-haired girl". Meredith recalls being able to communicate with a kidnapped Lydia over an immense distance. Meredith had received a message that Lydia does not want them to look for her. She listens to a phone, and says "Coup de Foudre". Scott translates her message as French for "Love at first sight", the phrase Noshiko Yukimura had taught her lover Corporal Rhys at Camp Oak Creek in 1943: Lydia is at Camp Oak Creek. Meredith is then presumably returned to Eichen House.

In Season 4, Lydia and Malia decide they need help from Meredith in "I.E.D." to decode the rest of the Dead Pool. Meredith heads to the high school, but is brought to the sheriff's station by Parrish, saying she's looking for Lydia. Lydia and Malia arrive and they ask her about what she knows. Meredith is cryptic as always saying Lydia 'called her'. Parrish offers input that perhaps what she needs to tell Lydia may be a number to call. Meredith affirms this reciting the number 2-4-3-6. Lydia says a phone number is ten digits, but Meredith repeatedly insists that's the number. Malia and Lydia later figure out the number sequence spells out AIDEN on a telephone pad, cracking the second third . In "Orphaned", Lydia and Stiles pay Meredith a visit at Eichen House where they implore her to reveal the final cipher key. Meredith is shaking in fear saying things have changed, though she telling Lydia she wanted to help. Lydia asks Meredith why not help now. Meredith says 'the Benefactor' doesn't want her to tell them. They ask Meredith for his name, but eventually she lets out a banshee scream giving Lydia a bleeding ear. When Lydia decodes the final third of the Dead Pool, she sees Meredith's name and Lydia immediately has Parrish check on her. Unfortunately, Meredith had apparently committed suicide by hanging herself out of fear for her life. Her corpse is found by Brunski and Lydia and Stiles mourn her death. In "Weaponized", Lydia claims a box of Meredith's possessions and finds a photo of Meredith standing in the study of the Martins' lakehouse. Lydia learns about the history of her grandmother Lorraine Martin and that Meredith was one of her subjects brought in for her study of parapsychology; Meredith had put on headphones for a test. Her ears bled out causing her to be hospitalized for a year.

In "Perishable", after Brunski dies from being shot by Parrish to save Stiles and Lydia, Meredith reveals herself to be alive. she had been using Brunski because she knew of his being a serial killer, and says, "(Brunski) wasn't on (her) list.": Meredith is revealed to have been the Benefactor all along. In "Monstrous", Meredith is brought to the sheriff's station. Lydia implores Meredith why would she launch the Dead Pool. Meredith tells Lydia she only wanted "to help" and that she'll only talk to Peter Hale. When Peter arrives, he repeatedly tells Meredith they have never met. Meredith says Peter doesn't remember her. Peter reacts to this, initiating a mind meld. Through Meredith's memories, it is revealed during her hospitalization from Lorraine's research, Meredith was placed next to Peter when he was comatose from the Hale Fire for months. The whole time, Meredith could involuntarily hear Peter's thoughts telepathically: Peter was ranting due his trauma from the fire, raving over how he'd predicted the Argents would target his family. Meredith was terrorized by Peter's cognizant revenge-fueled thoughts that he would remake the supernatural population of Beacon Hills in his image instead of his sister Talia's. To do this, Peter had said first he'd hire assassins to purge Beacon Hills of supernatural people, placing them all on a hit list, "The Dead Pool". Peter was originally the one who planned the Dead Pool, though he didn't remember; Meredith, using Lorraine's computer code to comprise the Dead Pool, put the list online. After Peter leaves, Lydia talks with Meredith afterward, showing her compassion for someone who'd put their name on a hit list. the latter justifying Peter's 'plan' in that the supernatural are monsters, even them the banshees. She believed too many people have died because of them, and that she decided "to help": she enacted the plan in response to her Hearing Lydia Scream as Allison died. Lydia tells Meredith "not all monsters do monstrous things", like Scott. Meredith touches Lydia's face and realizes, like Lydia herself also. The vulnerable, brainwashed banshee sheds a tear, showing remorse, lamenting "What have I done?"

In Season 4, Brunski appears in "Orphaned" where he hassles Parrish, Stiles and Lydia when they come visit Meredith. Brunski demands they come back with a court order. He then talks down to Stiles letting him know of Stilinski's overdue payment for Stiles' bills. Parrish has Brunski back off saying he owes them a favor for the Canaan PD talking him out of a DUI charge. Brunski finds Meredith's corpse after she'd hung herself. In "Perishable", Lydia and Stiles bribe Brunski with $500 for a look at Eichen House records concerning a list of people Lydia had been left by her grandmother, Lorraine Martin, who'd all committed suicide at the institution over the past decade. Brunski lets them into the file room, but just as Stiles realizes Lydia wrote down his name on the list, Brunski sneaks up behind them and tasers both of them. He binds them with restraints, and Lydia realizes the suicides committed were actually murders committed by him, including Lorraine and Meredith, and conclude that Brunski is 'the Benefactor'. Brunski bawls that some people are just beyond helping, and that he helps them, not by treatment, but by "releasing them". Brunski then plays a tape for Lydia - a recording of when he murdered Lorraine, emotionally torturing Lydia. Stiles bawls at him to turn off the tape, but he punches Stiles quiet. Lydia hears her grandmother's dying words, pleading with Brunski not to hurt "Ariel", Lorraine's nickname for her granddaughter. Brunski takes a syringe, a lethal injection and just as he stabs the syringe into Lydia's neck, Parrish appears. He orders Brunski to withdraw from Lydia's neck. Brunski scoffs, telling Parrish "Young Deputy" that he's young and bets he hasn't ever fired a gun, but Parrish proves him wrong, shooting him.

As Brunski dies, he laughs telling them he wasn't controlling Meredith or anyone, he wasn't 'the Benefactor', he was being controlled by her. The true perpetuator behind the Dead Pool, the assassinations then appears, a very-much-alive Meredith Walker. Brunski was realized to have been blackmailed by Meredith in helping her put together the Dead Pool plan because of his being a serial killer. Brunski was the culprit who'd broken into the Hale Vault, stolen the Hales' bearer bonds, converted them into cash, issued the tapes to the assassins and sent out the payments electronically under Meredith's instructions.

In "Orphaned", it is revealed that over the years Satomi had become an Alpha of a Pack: werewolves targeted by assassins in Beacon Hills, DeMarco Montana, Carrie Hudson and Brett Talbot were all Betas of this Pack. Satomi had risen to her status by adhering to the percepts of Buddhism; several of her Pack members utilized the mantra "Three things that cannot be long hidden. The sun, the moon, the truth" as an anchor for their animal nature. Derek and Malia track down Satomi's Pack to warn them of the Dead Pool, but they find multiple members of the Pack slaughtered. Satomi appears in "Weaponized" arriving at Deaton's animal clinic with Reed, a Pack member of hers who was sick from what killed the others, eventually dying, to Satomi's sorrow. Satomi's Pack were all infected with a virus, a variant of Canine distemper designed for werewolves. Satomi meets Derek, realizing how much he reminds her of Talia. Satomi knew Talia, she'd occasionally visited her before the fire. Derek tells her he remembers because of the tea they drank during such occasions which he found smelled awful. Deaton figures out Satomi wasn't infected with the virus because she has been inoculated from the tea recipe, from Reishi mushrooms, a powerful anecdotal. An assassin shows up and opens fire on Derek and Satomi, but Satomi dodges the bullets and kills the assassin. In "Monstrous", hunters-turned-assassins have swarmed into the area, and Satomi's Pack now totals only eight members, herself included. She and her Pack regroup at the Animal Clinic after Kira saves Brett and Lori, the youngest Betas from the hunters. Kira introduces Satomi to Scott. They bring the Pack to the abandoned Argent Arms International warehouse and rally Chris, Braeden and Derek. Satomi is wary of Chris at first, but Scott tells Satomi he trusts Chris. Chris remembers Satomi from a meeting in the past, he asks her what her mantra means to her. She responds it means 'the truth' that werewolves are inherently violent creatures cannot be denied in reflection of her loss of control that lead to Rhys' death seventy years previously. The assassins arrive, and the group is able to fight them off, until the Dead Pool is shut down, terminating all the Benefactor's contracts with no casualties.

Satomi is well known amongst werewolf Packs because she is one of the oldest wolves alive; she is physically identical to how she appeared back in 1943 indicating a trait of long life. Satomi is a wise, progressive leader and guardian of her Pack, having taught her members control as well as talents to avoid detection. She is a philosophical and disciplined individual having mastered her inherent rage as a Bitten werewolf, but willing to kill if it means self-defense or protecting her Pack from harm. Satomi has immense supernatural agility, able to evade gunfire at point-blank rage and wields an emei blade as a weapon.

In the Season 4 premiere, "The Dark Moon", Scott and his Pack infiltrate Araya's base under the belief she had taken Derek, however, the hunters manage to outmaneuver them and take them hostage, revealing they don't have Derek. Araya has Scott and Lydia wired for torture by electricity. She has Kira turn the dial on Scott by threatening to electrocute Lydia as a test for what kind of Alpha Scott is. During the torture, Araya viciously claims Scott already knows who could have Derek, someone who was a shapeshifter, but not turned by a Bite, who had a vendetta against him. Scott figures out that Kate is whom Araya is referring to. Araya spitefully tells Scott he wouldn't have believed her if she'd just told him. Araya has been hunting Kate ever since Kate broke the Hunter's Code by refusing to commit suicide upon her transformation. Having confirmed Scott is a True Alpha by Scott overcoming the electricity by sheer determination, Araya intends to use Scott' Pack to find Kate for her as the men she's sent have wound up dead. Araya releases Scott's Pack with a not-so-veiled threat, if Scott Bites an innocent, she'll come knocking at his door. In "I.E.D.", Araya and Severo arrive in Beacon Hills to enlist Chris in hunting Kate. Chris and Severo hold each other at gunpoint, at which she amusedly calls as "a standoff". Araya recites the Hunter's Code and plays on Chris' grief over Victoria and Allison's deaths family to have him change his ways and return to being a hunter. In "Smoke and Mirrors", Araya and her men arrive at La Iglesia and face off against Kate and her Berserker. After Kate kills one hunter, Kate tells Araya she's next. Araya faces the werejaguar, telling "La-Loba" she'll see how the Calaveras die. Instead, Araya watches on as Kate is defeated, severely mauled by Derek in a full-wolf-shapeshift. When Kate escapes, Araya continues her hunt of Kate with Chris in tow as he agreed to, but on the condition she has to leave Scott and his Pack be.

Araya is most often portrayed as easily amused with a wide smile on her face, while simultaneously displaying her ruthlessness and cruelty towards supernaturals, particularly werewolves, typical of a hunter, or hunters who violate the Code, even people who cross her as she murdered one of her own men for "robbing" her. While zealous and amoral as a hunter, Araya is ultimately fair as she follows the Hunter's Code not to kill were-creatures unless there's proof they've harmed innocents. Her base of operations is a music/dance club as she has an adoration for "the music of youth".

In "I.E.D.", Mason tries to calm Liam down when he lets Liam know the pre-season scrimmage is against his old school, Devonfort Prep and when Liam later confronts his rival, Brett Talbot. At the game, Mason tells Liam he can totally take Brett on, while at the same time being in denial that he thinks Brett is hot, but they both laugh it off. In "Perishable", Mason shows concern over Liam's strange behavior when he's traumatized from fighting a Berserker and his stress because of the Dead Pool situation. At the annual lacrosse bonfire, he tells Liam not only does he want Liam to tell him what's going on with him, he wants to help him. When Liam, Malia and Scott are disabled, Scott tells Mason their well-being is not the drinks, it is because of the music. A team of assassins had wired a sonic weapon into the music, that was weakening the three shapeshifters because of their sense of hearing. When Mason sees the three being taken away by the assassins, posing as security guards, Mason seemingly concerned about them, pulls the plug to the DJ's booth, shutting off the music. His actions unknowingly saves Scott, Liam and Malia from being burned to death. Mason, though thoroughly confused by what's going on with Liam, he nevertheless tries to convince Liam to talk to him whenever he's ready to talk in the penultimate episode of Season 4, "A Promise to the Dead".

In "Smoke And Mirrors", Mason is asked by Liam to check on Lydia when she's missing, but he's attacked by one of Kate Argent's Berserkers, along with Lydia. He's confused by Lydia referring to the creature as 'not human', that if they don't stop it Scott, Liam and her friends will die, and watches as the Sheriff blows up the Berserker with a landmine. In Season 5, "Parasomnia" during sophomore year Mason, intrigued, has been obsessing over what he saw, having purchased a rare, expensive book over the summer. He shows Liam an image of a Berserker, but is annoyed when Liam brushes it off. Mason is silently amused when Liam is pranked by his middle school enemy Hayden. Liam meets Mason at the school late at night to talk but Mason notices a black wolf (a fully transformed Theo Raeken) which chases them into the school. Mason witnesses Liam scare the animal away with his werewolf roar and says with excitement "You're a werewolf!" In "Dreamcatcher", Mason, boisterous, beside himself with awe, is introduced to the Pack and their different supernatural species when they all meet to discuss Tracy Stewart, more so when he learns Brett is also a werewolf. Brett talks with him updating him on general werewolf lore. Mason goes along with Liam and Brett into the woods to find the sink-hole where Liam found Tracy's necklace. Mason says it's not a sinkhole, because it had to have been dug out from below meaning Tracy and the other Chimeras were buried alive, discovering the incubation process.

In "Condition Terminal", Mason talks Liam into being his wingman at the club Sinema where they run into Brett. Mason catches the eye of a boy named Lucas, and makes out with him, but he and Brett see he's another Chimera, a scorpion-man. Mason tends to Brett as he's slashed by the Chimera, witnesses Scott, Kira and Liam bring him down, and the Dread Doctors appearing, killing Lucas. In "Required Reading", Kira shows Mason the novel "The Dread Doctors", the function of which is to trigger wiped memories. Mason surmises the Fox in her can't read it, because the novel is one big language trick which according to his research kitsune have difficulty with. Mason later talks with Brett where he's given signs to look for in identifying supernaturals. Mason tells Brett of Liam's history with Hayden and their middle-school spat. In "Strange Frequencies", Mason runs into Corey, Lucas' boyfriend, and he gives his apologies to Corey over Lucas' disappearance. He catches the title of the book Corey was reading, "Miraculous Healing". Mason then sees Corey later at the club Sinema, where he sees the latter's necrotized arm has fully healed, realising Corey is a Chimera. Mason informs Scott while also snapping the True Alpha out of an illusion concocted by the Dread Doctors, but both learn Liam and Hayden have been taken. In "Ouroboros", Mason has brought Corey to the Pack and enlightened him. When Scott determines their location, Mason volunteers to go along with Scott and Malia to help find Hayden and Liam, saying Liam's his best friend when Stiles confronts him. Mason gives Scott a hand-up when the latter has a meltdown over the abduction from the failed plan. In "Lies of Omission", Mason keeps an eye on and bonds with Corey over his new Chimera abilities, but is distressed after the latter suffers a hemorrhage, and is taken to the hospital. In "Status Asthmaticus", Mason is at the hospital, attempting to help Melissa treat a poisoned Hayden. After being informed by Melissa that Hayden is on the verge of dying, Mason leaves to find and tell Liam. Mason snaps Liam out of his supermoon-induced rage where Liam almost kills Scott, telling him Hayden died a few minutes ago. In "The Last Chimera", Mason tries to be there for Liam during his mulling over his misguided actions. When they uncover evidence that Hayden may be alive, Mason figures out how to find the Nemeton: that Liam look with his supernatural eyes. They find the supernatural tree, but Hayden later turns up alive with cops taking the bodies.

In Season 5B, Mason and Liam discuss Hayden as well as other Chimeras having been resurrected by Theo. Mason concludes that Theo is building a Pack that's loyal to him and that maybe coming back has darkened the Chimeras; he's surprised when Corey turns up alive also. An mutual flirtation, then interest starts up between he and Corey, despite his reservations with Corey now a member of Theo's Pack. In "Codominance", Mason tells Corey he doesn't want to fall in with the bad guys. Corey answers there's no good or bad guys what with the resurrected the Beast lurking throughout Beacon Hills. Nonetheless, the two boys share a kiss.

"The Mute" is first seen in "Muted" murdering the Walcotts, a family of wendigos in their home, but is unable to kill the youngest, Sean, who manages to escape to the Beacon Hills Hospital. When Sean gives into his cannibalistic urges and takes Liam to the roof with Scott in pursuit, "the Mute" shows up on the roof, killing Sean by axing him in the back. He leaves Scott and Liam be after motioning for Scott to remain quiet with the shushing motion, the finger over his face. In "The Benefactor", "the Mute" attacks Peter Hale in Derek's loft with his tomahawk laced with wolfsbane, intending to assassinate Derek. Peter is able to fight him off and take his keyboard. Deputy Parrish is able to crack the code in the keyboard to track the IP address and determines it to be connected to the school's wifi network. At the school, "the Mute" sets a trap for Derek intending to kill him off with a claymore mine which he and Stilinski are able to see first. 'The Mute' then attacks but Derek and Sheriff Stilinski are able to overpower him. Stilinski attempts to arrest him, but Peter appears and attacks the assassin, clawing him, killing him out of revenge.

When Scott had faked his death in "Time of Death", "the Mute" appeared during his dream vision. Scott was subconsciously debating whether or not to kill his opponents to stop them. "The Mute" would appear representing his killer side, visually appearing to Scott while attacking or killing Liam. "The Mute" speaks to Scott in his computerized voice saying Scott is "evolving" into supposedly a killer as Scott had grown more fangs, indicating a growth in his transformation. The third time 'the Mute' appears, the assassin directs Scott how to kill with his tomahawk, saying "Let me help you. Let me show you", enticing Scott to kill Liam, his Beta.

Garrett is first seen in "Muted" during lacrosse practice and was on the lacrosse team. In "The Benefactor" he, Mason and Violet attend the party at Lydia's lake house with the other freshmen. Garret pays for the beer keg that was delivered to the party by the distributor named DeMarco Montana. It's revealed Garrett had ordered the beer keg to lure DeMarco, whom was a werewolf, to the party, so Violet could kill him. Both he and Violet are working for 'the Benefactor' by assassinating supernaturals in Beacon Hills, as seen when he and Violet learn they've received the money in their account for the assassination by a text sent by 'the Benefactor' and they kiss. Garrett and Violet assassinate another werewolf on the Dead Pool in "I.E.D.", Carrie Hudson, with Garrett delivering the killing blow with his blade. Garrett tries to talk Violet out of going after Scott reasoning that Scott came out on top when the Alpha Pack went after him. He reasons their initial target, Beta werewolf Brett Talbot was worth a lot of money as well. During the lacrosse game, Garrett wounds Brett with his weaponized lacrosse stick which was laced with yellow monkshood, immobilizing Brett. Scott and his Pack catch onto Garrett. Violet, instead of assassinating Brett, sets a trap for Scott which only ends with Scott overpowering Violet. When Violet is taken into police custody in "Orphaned", Garret goes into hiding. Out in the Beacon Hills Preserve, Garrett kidnaps Liam, poisons him with wolfsbane and traps him in a well deep in the preserve. He uses Liam as a bargaining chip to have Scott help him free Violet from the police, telling the Alpha that Liam will die if the wolfsbane reaches his heart. Scott and Garret follow the federal transport vehicle holding Violet. They come up to the overturned vehicle which had already been attacked by Kate and her Berserkers and Violet is taken. Garrett takes out his bladed lacrosse stick, rips off the mesh net, and wields his weapon intending to take on the Berserker in his path, but the other demon sneaks up behind him, and runs Garrett through with its blade, killing him.

Violet and Garrett both attend Lydia's lake house party in the episode "The Benefactor". Violet is seen coming upon the werewolf DeMarco Montana. She appears behind, strangles and beheads him with her necklace, her wire. Sending a picture of her kill to 'the Benefactor', she returns to Garrett's side afterwards who reveals that they've been paid for the assassination. They openly embrace and kiss. In "I.E.D.", Violet wants to start targeting people worth "the seven-figure-money", specifically Scott as he has the biggest bounty on the Dead Pool. Garret cautions her against going after him as Scott was left standing after the Alpha Pack went after him. When their target, Brett Talbot, is immobilized with wolfsbane, Violet goes in for the kill, but when Scott shows up to save Brett, Violet decides to target the True Alpha anyway. She wraps her wire around his neck, taking glee in having "got an Alpha", but Scott overcomes the wire and knocks her unconscious. Violet is then arrested in "Orphaned" by Stilinski, Parrish and Rafael McCall. Violet plays innocent saying she's just a student, but Rafael identifies she and Garrett as 'the Orphans' from her weapon, the thermal cut wire which had been reportedly been used in a dozen murders. Violet is held in custody to be taken into a federal transport vehicle. Garrett implements a plan to free her using Scott by having Liam as leverage. Before Garrett and Scott can move up to the vehicle, Kate Argent along with her Berserkers attacks the vehicle, takes Violet hostage for information on 'the Benefactor' and holds her at the abandoned Argent Arms International warehouse, a building the Argents once used for their arms business. Scott and Chris Argent find the building and take on Kate and the Berserkers. Scott eventually finds Violet - already dead, killed by Kate.

Brett is first seen in "I.E.D.", when his lacrosse team arrive at Beacon Hills High for the pre-season scrimmage. Liam approaches Brett, attempting to show sportsmanship, but Brett and his teammates tell Liam they are going to break him in half for what he did to their coach's car. During the game, Brett refuses to let Liam off for the car incident when Scott asks him to as Scott was attempting to keep Liam from losing control. When Brett comes into a collision with Liam and Garrett, he is transported to the locker's room, Stiles learns Brett is on the Dead Pool, worth $1m and is a Beta werewolf. Brett wasn't initially identified as a werewolf because he was taught how to mask his scent. He is attacked by the assassin Violet and is defenseless because the other assassin Garrett had poisoned him with a blade laced with yellow monkshood. Brett is saved by Scott, and is taken to Dr. Deaton's clinic for treatment by Stiles and Derek. Brett chants the mantra, "The sun, the moon, the truth". This allows Deaton, Derek and Peter to figure out that Brett is from a Pack which has an affinity for Buddhism, and whose Alpha is Satomi Ito. In "Monstrous", Brett, along with Lori are seen being chased by assassins who are hunters. Brett stands in front of Lori to protect her when hunters have laser sights on them, and arrows are subsequently fired at them. Kira saves their lives slicing the arrows in mid-air. At the Animal Clinic, Brett and Lori have regrouped with Satomi and the remaining Pack members who are all exhausted and battle-weary. They all meet Scott who has them take refuge at the Argent Arms Int. warehouse until the Dead Pool is finally shut down, saving the rest of the Pack.

In "A Promise to the Dead", Brett has made peace with Liam, in gratitude for Scott's Pack saving he, Lori and his Pack members. During the real game against Beacon Hills High, Liam is still traumatized from fighting the Berserkers. Brett tackles Liam, body checking him to get him realize he is alive. After the game, Brett has turned over a new leaf with Liam. He ultimately helps his former rival overcome his trauma by telling Liam he's lucky Scott is his Alpha because Scott is a True Alpha, he gained his power not by killing, dominance or taking power from others, he earned his status. Liam is ultimately inspired when Brett tells him he's not strong because he has super strength, but because he endures. In Season 5 "Dreamcatchers", Brett is playing lacrosse when Liam and Mason visit and come to him asking if Satomi knew of any Alpha that could have Bitten new supernatural Tracy Stewart. Brett replies he hasn't seen Tracy before. He informs the newly-enlightened-Mason on some general werewolf lore. He accompanies Liam and Mason for the sink-hole where Tracy fell in and left her necklace. The three of them determine that Tracy had actually been buried, uncovering the Dread Doctor's incubation process for the Chimeras. In "Condition Terminal", at the club Sinema Brett dances and flirts with both a guy and a girl and runs into Liam and Mason again. He shares shots with Mason, but later protects him from Lucas, a werewolf/scorpion Chimera. Brett is slashed by the Chimera, but Lucas is eventually brought down by Scott, Kira and Liam. All five of them witness the Dread Doctors as they appear and kill Lucas. In "Required Reading", after new Chimeras have been created, Brett continues to help out, saying everyone at Devonfort seems normal. He gives Mason signs to look for in supernatural creatures, and is told of Liam's history with his middle-school enemy Hayden from Mason.

Valack first appears in Season 4 "A Promise to the Dead" in his cell reading a romance novel. He is visited by Alan who introduces himself. Valack lets Alan know he's aware Alan's specialty is not actually "cats and dogs". Alan asks for information on Valack's knowledge of South American lore. Valack corrects Alan he wants to know about Kate Argent, about "La Loba" or "the Bone Woman". Alan wishes to know what Kate had done to Derek (regressing Derek back to his teenage self), the subsequent loss of his powers asking if Derek could be dying. Valack tells Deaton he'll have to move closer. Deaton reluctantly complies. Valack displays his third eye; it opens up and Alan receives a vision of La Iglesia, but is rendered unconscious. In "Smoke and Mirrors", after his plan to have Scott killed fails, Peter Hale is incarcerated for his crimes, and he is placed in Valack's cell. After Peter swears he'll escape, Valack humors the werewolf due to the mountain ash all around them. Peter demands to know who he is. Valack replies he could tell Peter, but that it will be easier to just "show (him)" and removes his bandage, revealing him his third eye. Peter screams in horror, slamming against the Plexiglas. Valack smirks.

In Season 5, Scott's Pack are lead to Valack by the novel "The Dread Doctors" by a T.R. McCammon, illustrating the Doctors in "A Novel Approach". At Eichen House, Stiles and Lydia visit Valack for information. Peter has been moved to a new cell. Valack knows what they want, asking for the book, and that the Dread Doctors are in Beacon Hills also. Valack affirms he is the author under a pseudonym. He says the Doctors gain their power, longevity and erase the memories of those who've encountered them by their discovering of electromagnetic forces. When Lydia asks what they want, Valack replies he wants Lydia to record a banshee Scream as the deal. Stiles is hesitant, but Valack fires back that the Doctors are in Beacon Hills because their Pack reignited the Nemeton. When the Dread Doctors infiltrate the institution for Valack, he hurriedly says the book is a tool that triggers erased memory senses of those who have encountered the Doctors. Lydia complies, handing the recorder back through the cell flap. As the Doctors approach, Valack yells "Read the book!". Stiles and Lydia hide and leave, but the Dread Doctors open Valack's cell. Using a device, they tear out his third eye. The Dread Doctors leave him in pain. Valack then plays the recorder playing Lydia's Scream against the cell wall glass of his cell, the subsequent compression causing the glass to crack, engineering his escape from his cell.

In Season 5B, Valack has taken over Eichen House. In "The Last Chimera", after Lydia is rendered catatonic at the hands of Theo Raeken, when Natalie Martin signs a transfer paper for Lydia to be brought to Eichen House, Valack (glamoured as Dr. Conrad Fenris) promises Natalie her daughter will be safe. It's revealed Valack was chief medical officer at Eichen House before his imprisonment. Valack experimented on supernatural patients, any creature he could get his hands on. Performing trepanation would heighten the powers of the subject, but the new levels would be uncontrollable resulting in his subjects dying out. Once Lydia comes out of her catatonic state, and attempts to escape, Valack distracts her by glamouring as Aiden to her shock. Valack has Lydia restrained and presses her to remember what's happened to the Pack over the last few weeks. Lydia (seeing right through Valack's veil) is still recovering and is amnesiac. Valack produces a drilling device used for trepanation and performs a procedure on her. When Lydia comes to, she has a vision of the time and circumstances of when Theo killed his older sister. Valack uses her to find out more information on Theo and the Dread Doctors. In "Amplification", just as Valack is questioning Lydia, both Theo and Scott's Packs and Parrish attempt a jailbreak for Lydia.

Theo first appears in Season 5 "Creatures of the Night", in his werewolf shape, helping Scott and Kira fight off the werewolf/garuda Chimera Belasko. Scott eventually recognizes him. Theo says he's come back to Beacon Hills because he'd heard of Scott McCall, his grade school friend, becoming a True Alpha, and wishes to join his Pack. In "Parasomnia", Scott and Stiles, at Stiles' urging, ask Theo for his story. Theo recalls he'd been Bitten when he was skateboarding in a neighbours' empty pool when an Alpha came upon him. This said Alpha was killed before Theo's first full moon by two members of his own Pack, twins (hinting to be Ethan and Aiden). He also recalls a moment in grade school which Scott remembers that convinces him. Stiles however, remains suspicious. Stiles later compares Theo's father's signature from his school transfer form to that of a speeding ticket from years ago, insisting they are not similar. Theo attempts to placate Stiles, saying he has Scott, someone who'll always look out for you, but he doesn't, that he's meant to be part of the Pack. However, Theo is later seen with his parents, who are actually imposters, and are terrified of him. Theo breaks the man's hand to put it in a cast, so to explain Stiles' evidence.

In "Dreamcatchers", Theo inconspicuously observes the events caused by the Chimera Tracy Stewart. He volunteers to help with the situation, saying it doesn't have to mean he's been accepted into the Pack. He saves a bleeding Lydia's life in "Condition Terminal" using his belt as a tourniquet. However, he's simultaneously working as a mole for the Dread Doctors. In their lair, he wickedly advises the delinquent Donovan into going after Stiles if he wants to cause the Sheriff "soul-crushing pain". In "Required Reading", Theo sets about breaking the Pack apart; he takes advantage of Stiles and Malia's secrets in their relationship (Stiles' killing Donovan in self-defense, and Malia impulsively confiding in Theo, because of his coyote side, that the Desert Wolf caused her family's crash), he plants seeds of doubt in Scott regarding Kira due to her Kitsune Evolution, then blackmails Stiles using Donovan's death into staying quiet about Theo killing a new Chimera, allegedly to save the former's life. He and Stiles form a forced partnership in "Strange Frequencies". He advises Stiles that Scott wouldn't be a True Alpha if he'd reject Stiles for killing in self-defense while successfully pulling Stiles under his influence. Theo is completely accepted into the Pack in "Ouroboros" after finding an abducted Liam and Hayden. He uses the latter two's romance to his advantage, staging Hayden's injection once she is declared "failure", and planting the idea in Liam's head that the Bite could save her, knowing Scott would say no. Theo lies to Scott on how Donovan's death at Stiles' hands occurred falsifying Stiles had murdered him in a rage, effectively breaking apart his and Stiles' friendship. In "Status Asthmaticus", Theo shows his true colors and executes his plan to take Scott's Pack and True Alpha status for himself. He manipulates Liam to kill Scott (because only Liam can steal Scott's True Alpha status, allowing Theo to steal it himself afterwards) and forces Stiles to make a choice to save Scott or his dad. After Liam fails, Theo angrily comes back to kill Scott himself. Scott, weakened, tells Theo to his face his Pack will never follow Theo because he is "barely human". He kills Scott in a petty tantrum. Theo then uses a mind-meld on Lydia, rendering her catatonic, so to find the Nemeton where the deceased Chimeras are kept by Parrish. He succeeds, then using a restorative serum developed by the Doctors, revives four of them, Hayden, Tracy, Corey and Josh. Theo declares to the revived teens he is their Alpha, and they belong to him. Having achieved his goal, Theo leads the four resurrected traumatized teens out of the Preserve.

In Season 5B, Theo's goal is revealed to become a real werewolf and a proper Alpha. Ever deceptive and self-serving, Theo takes command of his Pack, devising ways to help them develop and control their abilities, giving them false pretenses only he can keep them safe when in truth dominating them, trying to turn them into killers. In "The Last Chimera", he is irked upon discovering Scott survived. Aware that Parrish is a hellhound and the Dread Doctors have resurrected the Beast of Gevaudan, Theo proposes a truce with Scott's allies saying the Beast is what they need to worry about. Theo sets about tracking down the Beast. In "The Sword and the Spirit", Theo seduces Malia into letting him help her find the Desert Wolf. After arriving at the location, Theo betrays Malia and Braeden. It is revealed that Theo made a deal with the Desert Wolf, whose actual name is Corrine. In exchange for bringing Malia to her, Corrine hands him the garuda talons of the late Chimera Belasko. Theo then meets with the villainous Alpha Deucalion whom his Pack have captured. Theo wishes for the Demon Wolf to give show him how to steal the Beast's power.

Personality-wise, Theo is charming, serene, calm and charismatic. He is a sociopath, liar and trickster, being manipulative, cunning, seductive, self-serving, and feels no remorse, guilt nor does he care who gets hurt due to his actions. As a Chimera, Theo is unaffected by everyday supernatural rules. He has taken lives, but displays the golden canine shapeshifter eyes of an innocent. He can also penetrate mountain ash barriers and cast them himself. Theo has traits of both werewolves and coyotes. He is able to shapeshift into a werewolf, and thanks to his werecoyote part, he can shapeshift to both a full wolf and a full coyote form.

The Dread Doctors were once human scientists who worshipped the supernatural. Discovering and manipulating the secrets of electromagnetism, the Doctors rescinded their humanity, prolonging their lifespans, giving them power, including mass illusionary projection, phasing, teleportation, and the ability to harness and manipulate electronic frequencies. The Doctors are frequently outfitted with breathing tubes, gas masks to accommodate their altered biology. They hold a humanoid specimen that provides them with a serum with rejuvenating properties so to restore their declining health.

In Season 5A, the Dread Doctors are partners with Theo Raeken, working to break Scott McCall's Pack and fellowship apart. The three humanoids also perform a procedure on Kira to enhance her Thunder Kitsune power to use to their advantage. In "Creatures of the Night", the Dread Doctors send a Chimera named Belasko to siphon Scott's True Alpha powers. When he fails, they declare him useless, saying their time is limited, and pronounce "no second chances". The Surgeon spears Belasko with his sword cane. Throughout the season, the Dread Doctors carry out their experiments abducting, converting and brainwashing innocent teenagers, altering them into Chimeras, creatures with incongruous body parts of more than one supernatural, werewolf claws, garuda talons, Kanima hide and venom, wendigo teeth, etc., while also breaking the set rules of the supernatural, i.e. their produced Chimeras can penetrate mountain ash barriers. They come into contact with Scott's Pack, while simultaneously employing Theo Raeken to act as a spy amongst the Pack for them. When the Chimeras come to bleed mercury, the Doctors kill them off declaring them failures; they searching for a "success". In "A Novel Approach", Theo reports to the Doctors Scott's Pack is going to see Dr. Valack at Eichen at nightfall. Eichen House was closed off to them due to electromagnetic energy from the convergence of ley lines. Kira's Thunder Kitsune power however, disrupted the defences allowing the Doctors to enter. This allows them restrain Valack and rip out his third eye, presumably because of his clairvoyance ability being a threat to them. In "Strange Frequencies", the Doctors move to experiment on their latest victim, Hayden Romero, but Scott's Pack manage to intervene. They attempt to capture one of the Doctors by disrupting their frequency using cellphone jammers. The Doctors outsmart them, the Surgeon declaring they run "on a frequency (they) can't possibly imagine". Successfully abducting Hayden, and performing experimentation, Hayden is declared a failure. In "Lies of Omission", Theo requests Hayden be kept alive a little longer so to use her to his advantage in breaking apart Scott's Pack. The Surgeon tells Theo he has until the perigee syzygy (the upcoming supermoon). In "Status Asthmaticus", the Doctors observe their latest Chimera, the Surgeon stating "Success ... imminent." The Doctors later on, look upon a fresco of two monsters (one engulfed in fire) in a duel. The Surgeon pronouncing the Chimera as "La Bete", and a "success".

In Season 5B, Valack reveals the Dread Doctors' goal was to produce the most effective killing machine and that they've perfected the process with their last Chimera - their latest test subject serving as a host for a resurrected supernatural creature - the Beast of Gévaudan. Their goal succeeded, the Doctors watch over and cover for the Beast, nurturing its naturally lethal and destructive actions as it rampages throughout Beacon Hills. The Doctors inconspicuously leave the Beast the message "Damnatio Memoriae", meaning they want the Beast to remember itself in it's previous life to reach its full potential.

Hayden first appears in "Parasomnia" in Ken Yukimura's history class with Mason and Liam. Hayden chews bubblegum while Liam is chagrined that he has to sit next to her. When Ken asks Liam to sit, he sees he'd sat in Hayden's gum, to her satisfaction. Hayden is then next to Liam at the lockers. She tells him she's not still pissed off for sixth grade, to his confusion, but follows up with saying "I'm vengeful." In "Dreamcatchers", Hayden notices Tracy Stewart, a senior, in their class. She is concerned and put off by the Chimera's behavior. When the class evacuates due to a fire alarm, Hayden examines Tracy when Scott and Liam enter the room. Tracy then grabs Hayden's arm, clawing her to the latter's distress. After Tracy lets go and collapses, Hayden curiously watches, and questions Liam as Scott and his Pack take Tracy out of the school. Liam offers to take her the nurse's office, but she coldly shoots him down. Hayden goes to the bathroom to clean up Tracy's claw marks, but after the blood is washed away, she sees, to her astonishment, the wound has healed.

Hayden has a part-time job as a shot-girl at the bi club Sinema, first seen in "Condition Terminal" to make ends meet. She allows Mason and Liam access to the club for a plus $50. Liam later accidentally spills shots she's carrying, to her ire. In "Required Reading", Liam attempts to mend his relationship with her, starting with paying her back for the shots. Hayden refuses, saying she doesn't care about his nice guy act. Liam answers she can keep on hating him for the sixth grade, but insists on paying her back. She eventually accepts some of the debt. Hayden has a faceoff with Liam over their respective sports at school PE. She then sees Liam later rush to assist an asthmatic Scott with an inhaler. She smiles, touched at this display of care. Hayden decides to convince Liam to forget the shots, because her obnoxious boss Phil, takes half her money hearing it from several yards away, which Liam catches. He places a glow stick near her face to her confusion, but her eyes reflect the light, revealing she's a Chimera. Hayden is annoyed, weirded out when Liam attempts to convince her of the supernatural to protect her. After Liam shows her his Wolf face, his rescuing her from the Dread Doctors, brought to Scott's Pack and then being horrified at seeing her own werewolf features, she answers them: "I believe you". In "Strange Frequencies", Scott's Pack utilizes a plan to protect Hayden from the Dread Doctors as well as attempt to capture one of them. Liam stays by Hayden's side. She asks herself "what am I", with Liam answering she's Hayden, their feelings for each other deepening. The plan fails, leading to Liam and Hayden being captured. In "Ouroboros", to her distress, Hayden is experimented upon by the Doctors, resulting in her bleeding black blood. She and Liam comfort each other while held captive, holding hands, seeing another Chimera Zach being taken away. Eventually, they are 'rescued' by Theo. Hayden and Liam then kiss, with Liam also activating his pain siphoning ability taking away her pain. Hayden is ultimately amazed and inspired at this, her enmity of him completely gone. Liam and Hayden spend the night afterwards at Scott's house, starting a romantic relationship.

In "Lies of Omission" Hayden and Liam take content in their newfound bliss. Hayden's wounds has healed, but she soon starts to bleed mercury, indicating she is a failure. Scott's Pack do their best to keep her safe, but she is soon poisoned by the Doctors. Melissa McCall attempts to treat her. Faced with the possibility of dying, Hayden asks Scott for her sister. Unfortunately, she slowly dies, to Liam's devastation. Her body is taken by Parrish to the Nemeton. Theo however finds the supernatural tree. Using a restorative serum provided by the Dread Doctors, Theo revives Hayden, bringing her back to life. Theo announces to Hayden, along with a similarly revived Corey, Tracy Stewart and Josh Diaz, he is their Alpha and the belong to him. They instinctively follow Theo, all of them following his orders as if in a trance. In "The Last Chimera", after Liam and Mason locate the Nemeton (Liam being a supernatural creature), Hayden reveals herself to Liam leading the cops to the location revealing the remaining corpses so to cover up her death and those of the others'.

In Season 5B, Hayden is traumatized, staggering following having been resurrected, unsure on how to feel about coming back to life. She becomes more alert, having taken a higher sense of self-preservation. Like the other Chimeras, she falls under Theo's thrall, following him, falling for his promise that only he can keep them safe and is saddened over being unable to talk to her sister about her experiences, but she can't die again for Valerie. She is frosty, appalled at Liam for his leaving her for dead and his trying to kill Scott, one of his best friends. Liam confronts her for being in Theo's Pack after the latter's treachery is revealed. In "Codominance", Hayden patches things up with Liam saying nothing feels right after being revived except for when she's with him and admits her fear of dying again, and Theo can keep her safe in a way Scott can't. She and Liam ultimately carry on their romance.

In "Creatures of the Night", Donovan first appears being dragged into the Sheriff's station by Deputies Clark and Cordova, arrested for breaking and entering, and possession of a weapon. Sheriff Stilinski comes up to Donovan, reminding him the next time he ran afoul of the law would be jail time. Donovan tries to reason with Stilinski, but the Sheriff simply says "Book him". Donovan then immediately and repeatedly screams and curses at Stilinski, telling him he's dead. In "Dreamcatcher" Donovan is readied for prison transport by Clark and Parrish. His attorney, Mr. Stewart arrives wishing to converse a reasonable deal. Donovan listens, but then stubbornly bawls at the Sheriff, threatening to gut him with a knife in exploratory detail. Stilinski orders Donovan be taken out. As Donovan is brought to jail in the prison transport van, the vehicle is attacked by a shapeshifted girl whom Mr. Stewart calls Tracy - his daughter. Donovan witnesses Tracy savaging the van, but escapes out the back, terrified. He looks back just as Tracy kills Mr. Stewart. Suddenly he runs into the Dread Doctors. The Pathologist holds him while the Surgeon drills a lobotomy into his skull. Silver lids appear over Donovan's eyes. He is later seen unharmed when Scott tracks him down and subdues him. Donovan is re-imprisoned at the station. He experiences head pains, the silver lids over his eyes appearing now and then. In "Condition Terminal", during Tracy's attack on the station, the Doctors appear, coming for Donovan, and abduct him. Donovan is seen later in the Doctors' lair, struggling, strapped to an exam table. They take turns examining him; the Surgeon declares Donovan "looks promising". The Geneticist, performs one last procedure, tearing out Donovan's teeth, allowing new wendigo teeth to grow in place.

Donovan is later visited by Theo Raeken. He mocks, and chews Donovan out, assessing his aptitude test to be a Deputy, saying he now can't be one like his dad. Theo tells him that he instead has something else now: power. He knows Donovan wants to go after Stilinski and make him suffer, but advises him that "real pain is emotional pain". If he wants to get back at Stilinski then he should go after someone he loves, imploring the unstable young man to go after Stiles. Donovan takes this to heart. Later at night, at the high school, Donovan is free, and comes upon Stiles as the teenager is fixing his Jeep. In the struggle, he mauls Stiles' shoulder but Stiles fights back, but drops his cellphone. Donovan picks up the phone, then chases Stiles throughout the school, into the library. As Stiles hides, Donovan taunts him. He tells him Stilinski was once partners with Donovan's father when he was a Deputy. His father got caught in a shootout that severed his T-9 vertebrae that left him paralyzed while Stilinski was calling for backup. Donovan rants it's Stilinski's fault for being a coward, for his dad being in a wheelchair. He eventually catches Stiles, then chases him up a construction scaffolding. He grabs Stiles' leg, then taunts him he's not going to kill him, he's going to eat his leg away shapeshifting to his wendigo shape. Stiles, out of desperation, pulls out a ring that's supporting part of the construction; materials fall on top of Donovan. As Donovan falls backwards, he is impaled upon a metal bar through the chest, and dies. His corpse is taken by Parrish to the Nemeton.

Donovan was converted into a Chimera by the Dread Doctors because, like Tracy Stewart, he'd had an allogeneic skin graft from an unknown source. His Chimera DNA consisted of a lamprey and a wendigo. He had the eyes and fangs of a wendigo and could manifest lamprey mouths anywhere on his body.

In "Parasomnia" Tracy first appears in counseling with Natalie Martin. She tells Natalie she's suffering from night terrors, having trouble sleeping. She recalls ravens appearing at her bedroom window, her sealed skylight is open, and she's hallucinating the Dread Doctors. Lydia notices Tracy's symptoms, she and Parrish suspecting Tracy could be newly supernatural. They notice the skylight isn't sealed and the multiple dead ravens all over her roof. Her father, Mr. Stewart, has the skylight boarded up, tells Tracy he has to meet a client and he'll be back soon. Later on, Tracy starts sleepwalking. She walks into the Dread Doctors' lair. The Doctors appear. Terrified of their appearance, shedding a tear, Tracy tells herself she's just sleeping. The Surgeon responds to her she's "awakening", the Geneticist and Pathologist restrain her, and the Surgeon injects her with a fluid. Tracy roars, manifesting the claws and the fangs of a werewolf.

In "Dreamcatchers", Tracy appears, feral and out of her mind, outside a prison transport van after veering it off the road. Inside is her father and his client, Donovan Donati. Tracy attacks the van, wounding the two guards, then comes out facing her father in her shapeshifted state and savages him to death. Scott's Pack learn of Tracy, her night terrors and attempt to track her down, thinking she could be a new werewolf. Parrish learns later in the night Tracy was at the hospital, killing her psychiatrist. Tracy appears in Ken Yukimura's sophomore history class. Scott and his Pack come for her, but she hallucinates them as the Doctors. Tracy collapses, puking up mercury. Scott, Stiles and Malia bring her to Deaton for treatment while Kira and Lydia search her house. Tracy comes to, suddenly manifesting a Kanima's tail and hide, and escapes the clinic, even bypassing a mountain ash barrier. Lydia deduces Tracy is still in a night terror, sleepwalking, and is targeting people who tried to help her, including Natalie Martin. Tracy appears at the Sheriff's station having tracked down Natalie, wall crawling on the roof, paralyzing the deputies, about to savage Natalie. She wounds Lydia, but Kira fights her off, severing her reptilian tail. Malia arrives and takes Tracy on. The werecoyote eventually subdues Tracy. Malia snaps Tracy out of her night terror, telling her she's awake, and she's not dreaming. Tracy, fully awake and conscious, confused asks "What's happening to me?". Just then the Dread Doctors appear, and euthanize Tracy, killing her. Tracy's corpse is stored to the animal clinic, but Parrish, in a hellhound trance, then takes it to the Nemeton. In "Status Asthmaticus", Theo Raeken injects Tracy's corpse with a restorative serum, and she is brought back to life (along with Hayden, Corey, and Josh Diaz). The self-absorbed Theo announces to the four other Chimeras he is their Alpha and they belong to him. Tracy and the others follow Theo.

Corey is first seen in Season 5 episode 4 "Condition Terminal". Corey had been making out with his boyfriend Lucas. He noticed Lucas seemed like a whole different person. Corey then felt a sudden sting on his arm, and saw Lucas' eyes turn completely black, to his horror. Lucas left, telling Corey he'll see him at their favourite nightclub, Sinema. Corey was left writhing, screaming in "the worst pain of (his) life" and the wounded flesh on his left arm necrotized. Corey is forwarded to the hospital, still screaming. Melissa McCall and Dr. Geyer attempt to help him, pumping him full of morphine to no effect. Melissa calls Scott and Kira to the hospital, and Scott siphons his heavy pain, and Corey stops screaming. Though confused, Corey tells Scott and Kira that Lucas stung him, witnessing his features, and where to find Lucas.

In "Strange Frequencies", a fully recovered but unnerved Corey returns to school. He runs into Mason Hewitt at the library. He asks Mason if he'd seen Lucas at Sinema, if he'd said anything about Corey. Mason gives him his apologies over Lucas but said that he'd told the cops "everything". Corey thanks him, but leaves up a book he'd been reading titled "Miraculous Healing". Corey is later seen drinking at Sinema, but Mason asks him about his arm that had been melted off, but it had healed. Corey is distressed and confused over the bizarre things happening to him, but Mason identifies him as a Chimera. Corey is then enlightened on his situation, and brought to Scott's Pack afterwards. In "Ouroboros", Corey attempts to help locate an abducted Liam and Hayden Romero, reading the book "the Dread Doctors" to recover his altered memories, but a desperate, overwhelmed Scott instead performs a mind-meld to extract his memories himself. Corey is immensely disturbed by the process afterwards, but Scott rebuffs him saying he'll be fine. After Scott, Malia and Mason leave, Corey is just about to take off, being unwilling to help out afterwards, because "a werewolf wired his way into (his) brain with his claws". Theo tries to calm him down, and convinces him to try and remember something else. Corey after some pressing remembers an abandoned house which the Dread Doctors use to house the stored Chimeras, where Theo manages to 'find' Liam and Hayden. In "Lies of Omission", Corey eventually relaxes and adapts to his new identity with Mason's help, showing off super-strength in the school's gym to the latter. Unfortunately, he vomits up mercury, meaning he's not a success for the Dread Doctors. He's taken to the hospital, but escapes causing a ruckus as well as displaying a new talent, camouflage. The Surgeon however still locates Corey and kills him. As with all the Chimeras, Corey's corpse is taken by a supernaturally-acting Parrish to the Nemeton. In "Status Asthmaticus", Theo brings Corey (as well as Hayden, Tracy Stewart and Josh Diaz) back to life using a restorative serum, courtesy of the Doctors. Brainwashed, and in a zombie-like state, all four teens follow Theo upon his declaring they belong to him.

Josh first appears in "Required Reading" at the night club Sinema, then on the high school's lacrosse field. A Chimera, Josh was responsible for the electricity outages at the school, then at the hospital feeding on the electrical wires with his fangs. Josh, in a feral state, attacks Stiles on the hospital roof, but Theo engages him. Theo manages to overpower Josh, and tears out Josh's throat, killing him. In "Status Asthmaticus", Josh is revived by Theo via a restorative serum courtesy of the Dread Doctors. Theo declares to Josh, as well as Hayden, Corey and Tracy Stewart that Theo is their Alpha, and they all belong to him. Along with the others, Josh follows Theo.

In "Damnatio Memoriae", while at Sinema, Josh complains to Theo that he can't get drunk or high anymore because of his healing factor, saying Theo should have just left him dead. Theo tells Josh that maybe he should feel "something else" instead, handing him electric cables. Theo then attaches the cables to a car battery, which electrocutes Josh feeding his electrokinesis, having him shapeshift which Josh finds exhilarating, becoming power-drunk and falling under Theo's thrall. Like Tracy, Josh loses touch with his ability to feel empathy, becomes more violent as seen when Theo sends them out to test their abilities against Scott. In "Amplification", Josh along with the rest of Theo's Pack, infiltrate Eichen House to abduct Lydia under Theo's orders. Parrish, as a hellhound, appears and the Chimeras engage him to no use. When Corey is severely burnt by Parrish, Josh shows worry for the younger boy. He stops Malia from touching Kira because of her Thunder Kitsune power overload, saying he can feel the voltage from her. He makes a deal with Malia that he will siphon Kira's excess electricity and Malia will absorb Corey's pain so he can heal.

When Malia was nine years old, the Desert Wolf attempted to kill her. She opened fire upon the car she was in, along with her adoptive mother and sister; the car veered off the road, into the Beacon Hills Preserve and wound up in the ravine. Evelyn and the younger girl were killed but unbeknownst to her mother, Malia survived. The Desert Wolf eventually became the quarry of Braeden, the mercenary.

In Season 5 "Ouroboros", the Desert Wolf tracks down and corners Dr. Alan Deaton in Russia who was investigating an old lair used by the Dread Doctors. She kills his guide and holds him at gunpoint. The assassin informs him that she heard a rumour that her daughter is still alive, and interrogates him if he knows anything. Deaton lies he doesn't know anything about any daughter of hers. The Desert Wolf replies that if he's wrong then she'll just have to "kill (Malia) again". The Desert Wolf makes her way to Beacon Hills.

During the skirmish between the Argent hunters and nearby Packs, Talia and Deaton met with Deucalion concerning his proposed peace offering with the Argents. She advised him against it considering Gerard Argent's monstrous nature, but demanded that he meet Gerard on equal grounds. Talia was a wise and loving mother as she comforted Derek after he gave his girlfriend Paige a mercy-killing to end her suffering from Ennis' Bite, saying his newly changed blue eyes were still beautiful. She also removed Derek and Peter's memories of the Nemeton's location, ostensibly because what happened with Paige was too painful, but likely to prevent Peter from misusing it. Her children inherited her last name, showing the Hales' Pack, like the Argents, had a matriarchal leadership. Her elder daughter, Laura also had the capacity to shapeshift into a full wolf form. It's implied Talia taught Laura this power and also groomed Laura to succeed her as the Hales' Alpha. Talia appears in flashbacks in the episode "Visionary" in Season 3. Talia died in the Hale House fire.

In "Galvanize" of Season 3B, Derek utilizes a channeling ritual with Peter's help in order to communicate with Talia's ghost. Derek envisions meeting his mother in her wolf form atop a manifestation of the Nemeton inside his loft. Talia revealed to her son that the Hales didn't only live in Beacon Hills, they protected the town. In "Letharia Vulpina", Peter has Lydia listen to Talia's claws to translate a memory Talia had wiped from his mind before her death. It is revealed Talia had Peter forget he'd fathered a child – Malia Tate. It's revealed Talia had wiped Peter's memories of his child and that of the mother, as well as taking the child away from the mother who was the Desert Wolf Corrine after birth to protect the soon-to-be-named Malia.

During Season 1, in the webseries Search for a Cure, Scott and Stiles come across Dr. Fenris. Scott was looking for a cure of being a werewolf and Stiles said Dr. Fenris was the closest thing they had to an expert. They asked Fenris if they could ask him questions concerning his knowledge of werewolves. Fenris said no, that he was no longer involved with anything like that. Scott and Stiles later break into his house and Dr. Fenris catches them, holding them at gunpoint. Scott convinces him to put his gun down, saying he's a doctor, he has an oath to help people, not hurt them, and to just give them five minutes. Dr. Fenris relents. He gives them a basic rundown of the various stations of werewolves the Alpha, Beta, Omega, and the rights of passage they would conduct during the Wolf moon, the full moon in January. He's stressed, saying he needs a cigarette and his housekeeper has hidden them. Scott and Stiles see a photo of the woman he met in Wisconsin. Derek Hale is in the picture as well - the woman is presumed to be Talia Hale, his mother. Scott asks Dr. Fenris if he knows if there is any cure for someone who was Bitten. Dr. Fenris says he's never heard of any cure, despite his expertise. He demands to know why are they are interested in what he was obsessed with which resulted in his life, both personal and professional, being ruined. Scott and Stiles are disappointed but are sympathetic in what Dr. Fenris has been through. He insists they leave, but while they are leaving, Scott asks does he still believe. Dr. Fenris says sometimes, but he always returned to reality. Scott then tells him, if he really needs a cigarette, they're on the book shelf, behind the books. He flashes his werewolf eyes, then leaves. Dr. Fenris finds his cigarettes. Suspiciously, he runs back outside, but Scott had already left.

In "Wolf's Bane", Dr. Fenris is treating Jackson having a look at the scratches Derek had unintentionally left on the back of his neck. Dr. Fenris tells Jackson he has wolfsbane poisoning from the claw marks. Derek had been poisoned by wolfsbane and had passed on the infection to Jackson.

In Season 4, "A Promise to the Dead", Dr. Fenris is now more integrated into the supernatural world. He is seen employed at Eichen House, stationed in the secret prison level that houses supernatural beings. Alan Deaton had returned a wendigo, Patrick Clarke, to the institution. Dr. Fenris thanks Alan and allows him to see one inmate, Dr. Gabriel Valack. He advises him against seeing Valack, saying the last person who saw Valack too close "left the cell, but not the building". Fenris brings Alan out after Valack renders him unconscious, exasperated saying "they never listen". Fenris has Alan monitored every hour. Just when he declares Alan be moved to level 6, Lydia comes in to collect Deaton. Dr. Fenris tells her Alan is not responding to any external stimuli. Lydia assures him, Alan will "hear her." In Season 5 "A Novel Approach", Dr. Fenris lets Scott, Stiles, Kira and Lydia come down to the supernatural ward of Eichen House for intel on the Dread Doctors from Valack as a favor to Deaton. He advises them not to make eye contact with anyone "or anything". He informs them mountain ash is highly concentrated in the ward which is why Scott and Kira can't go any further because of their werewolf and kitsune status.

Eight years previously, Henry's family was caught in a car accident that caused the car to slide off the road into a ravine in the Beacon Hills Preserve. Evelyn and his younger daughter were killed, but Malia's body was never found. Henry spent the next eight years alone to deal with the tragedy of losing his family. In "Anchors", Sheriff Stilinski reopens the case when he notices the night of the accident was on a full moon and suspects a werewolf could have caused the accident. Henry finds belongings of Malia's from the night of the accident and wants to kill the coyote that supposedly killed mauled his family and/or killed Malia; in reality Malia was the animal as a werecoyote. He brings out rifles and bear traps, and almost kills Malia but Scott and his Pack save her. After eight years as a coyote, she is returned to human form by Scott; Henry is tearfully reunited with Malia. Malia now lives back with him, but she later learns she was adopted.

By Season 5, Malia has settled back into her father-daughter dynamic with Henry. Henry is seen in "Creatures of the Night" during a big storm where he rallies a party of people to lift an overlarge, uprooted tree. Malia easily lifts the tree with her super strength. Malia is checking her phone for her summer school test results so she can be a senior. Henry comforts and eases Malia telling her she'll find out when she finds out. Malia is then picked up by Scott, Liam and Stiles in Stiles' jeep for the annual senior scribe. After Stiles kisses Malia, Henry warns the boys that he owns a gun, then walks away with a lopsided smirk.

Geyer is first seen in "Muted", conversing with Melissa regarding the financial mess the hospital is in. When Liam is admitted to the hospital after Scott accidentally injures him during lacrosse practice, he converses with his dad saying it is his fault as he took on two juniors. Geyer shows him sympathy, while also saying they'd always agreed to "Play smart, not hard." In "Time of Death", Dr. Geyer is paged when Scott is forwarded to the hospital, supposedly dead. Geyer springs into action, having personal prep Scott for defibrillation. He shocks a number of times, but fails. He sets the defibrillator to 360 and shocks one last time. Scott remains asystole. Grimly, Geyer decides to call in and marks the time of death. He asks someone to page Melissa. He informs Melissa causing her to break down uncontrollably and he tries console her. Geyer didn't know Melissa was only acting: Scott's death was a ruse as part of a plan to flush out the Benefactor. When Noshiko is injured by the Berserkers, Geyer runs in and sees Melissa applying pressure and immediately runs to get help. When Scott is revealed to be alive, Geyer wants Scott to return to the hospital so to run some tests, as well as answers to many questions. In Season 5, "Condition Terminal", Dr. Geyer and Melissa are paged when teenager Corey is placed in the hospital. When Geyer asks what's wrong with him, Melissa indicates the large gash, and melted flesh on his left arm. They attempt to do whatever they can for Corey, pumping him full of morphine to no use. Geyer leaves Corey with Melissa, asking her to see whatever she can do for the teen, while he goes off to find an anesthesiologist.

In the 1970s, Lorraine was in love with a woman named Maddy. Lorraine worked for IBM in San Francisco. One weekend, at the office, Lorraine heard a strange sound. She heard rain and thunder, but when she looked outside it was a clear blue sky. The sound became so loud, Lorraine Screamed: she was a banshee. Maddy was about to be going out on the lake, so Lorraine suspiciously asked her about the weather. Maddy replied it was clear at the lakehouse too, so Lorraine said nothing about what she heard. The thunderstorm she'd heard in her premonition however arrived while Maddy was out on the lake, there was an accident, and Maddy died.

Lorraine spent years trying to learn how she'd known the rain would be coming, how she knew Maddy was going to die before knowing it happened. She brought in parapsychologists, pseudoscientists who designed the study in the lakehouse along with the record player, and later on, mediums and psychics. Everything failed, until Lorraine found Meredith Walker at Eichen House. Meredith was brought in one day. She put on headphones for tests, but the sound almost killed her and ended up hospitalized.

In Season 4, "Time of Death" Lydia learns of Lorraine's story and legacy. In Lorraine's will Lydia had been left behind instructions to scatter Lorraine's ashes out onto the lake, but what she found in the urn was not her ashes, but mountain ash, as well as computer code. This new code was a list of people whom were murdered by Brunski at Eichen House, he being a serial killer.

Lydia surmises in "Perishable" Lorraine eventually experienced another death prediction: the entire Dead Pool situation which would actually occur in the present. Lorraine had written the entire code which would ironically be used as the actual hit list, and had provided the actual computer servers which would serve as the Dead Pool. Lorraine's "erratic behavior" strained her relationship with her son, Lydia's father. Eventually, she was declared mentally ill, and was interned at Eichen House.

In Season 5, "Required Reading", Lydia experiences a flashback where she saw Lorraine after walking right into Eichen House when she was a little girl. Lorraine had drilled a hole into her head using trephination. Noticing Lydia, Lorraine looked up. The elderly banshee gave her granddaughter a message. "They're coming, Lydia. They're coming for all of us." Lorraine had predicted the arrival of the pseudo-supernaturals, the Dread Doctors.

One day, Lorraine had one final premonition. She escaped Eichen House and headed to the lakehouse. She was in the study, listening to the record player when Brunski came upon her. He injected Lorraine with a syringe, and Lorraine asphyxiated. Brunski recorded his murder of her, and plays the tape for Lydia. Lorraine had predicted Lydia's own near-death experience at the hands of Brunski. Lydia hears her grandmother's final breaths pleading with Brunski not to hurt "Ariel", her nickname for her granddaughter.

In "More Bad than Good", Severo is seen electrocuting Derek and Peter when the clan had captured the two wolves during their mission in South America to retrieve Talia's claws. He demanded the location of the "La-Loba" from the two Hales. When Derek and Peter say they don't know what he is talking about. Severo has one of his men start up a chainsaw threatening to cut one of them in half taunting then he wonders how far their healing goes, sure they can't grow back their head. They are called off by Araya. Severo is again seen in "The Divine Move" at Derek's loft cornering the werewolf with a team at his back. He is again demanding Derek for the location of the "La-Loba" or the "she-wolf". Derek tells Severo to just kill him, because he's never telling them where to find Cora. It turns out Cora isn't who Severo is talking about. Right then, a smoke bomb goes off in the loft and Severo's men are killed by unseen assailant, the La-Loba, Kate Argent, but Severo slips away. In "The Dark Moon", Severo is seen when Scott's Pack infiltrate the Calaveras' club in search of Derek. He assists Araya in her interrogation and torture of Scott. In "I.E.D", Severo faces off against Chris in a standoff with their guns drawn, when the Calaveras arrive in Beacon Hills to recruit Chris in hunting Kate. Severo is seen during the Calaveras' stand against Kate and her Berserker in "Smoke and Mirrors". He grimly stands at Araya's side as Kate is mauled by a fully transformed Derek Hale.

Tara arrives at the high school late at night in "The Girl Who Knew Too Much". She had responded to a potential 911 call. When she searches the school, she sees a pair of immobile feet supposedly being dragged into the locker room. She moves into the locker room, gun drawn. In the shower, Tara sees a corpse, against the wall - herself. Shocked immobile, the Darach comes from behind and strangles her dead. Her body is placed exactly as she saw in the illusion. Stilinski and Stiles are shocked and affected by her death: Stilinski is determined that the killer is not getting away with one of his own. Scott's Pack believed Tara was sacrificed as a Guardian, being in law enforcement. It is later revealed by Stiles, Tara was not always a cop, she used to be a middle school teacher, so she was actually sacrificed as a Philosopher.

Derek was content in his relationship with Paige. His uncle Peter, ostensibly, gave the relationship his support saying Paige is "perfect for him". But duplicitous as always, Peter deceptively talked Derek into the idea of turning Paige, to remove any inhibitions between her and Derek. After much persuasion, Derek reluctantly agreed to the idea. Paige had received a note supposedly from Derek, telling her to meet him late at the school one night. Peter had approached Ennis, an Alpha werewolf who was needing a new member for his Pack, to give Paige the Bite. Ennis appears attacking Paige to her fright. When Derek hears Paige's screams of fright, he changes his mind at once. He tries to stop it but is too late, Ennis had already bitten Paige. Unfortunately, Derek saw the transformation wasn't taking effect. Paige was expelling black blood; an effect of the Bite being fatal to her instead. Derek immediately takes Paige to the root cellar, the Nemeton, cradling her and fervently tries to save her life, siphoning away her pain. Paige asks him if she's going to die, Derek morosely nods yes. Paige tells Derek she suspected he was different, e.g. he'd say how he'd catch a scent, hear things. She comforts Derek, telling him she loved him anyway. Paige eventually let out a plea she can't take the pain anymore. Grief-stricken, Derek takes Paige gently in his arms, and hugs her with enough strength to break her neck, giving his first love a mercy-kill. Having taken an innocent life, Derek's werewolf eyes changed from yellow to blue, and Paige's death would haunt him in the years that followed.

In the present timeline, it was later revealed to Derek by Jennifer Blake that because Paige was a virgin and had died in the Nemeton, her Virgin status gave the tree a spark of power. This lone ember of magic gave the nearly-dead Jennifer the ability to survive her attack from the Alpha werewolf, Kali, just months later.

In "Galvanize", Barrow is forwarded to Beacon Hills Memorial to extract the shrapnel from his body. Melissa McCall takes his pre-op interview, to her discomfort. He rambles to her that he murdered those kids because he claims they had "glowing eyes", which makes Melissa and the Sheriff suspicious of him. During his surgery, a tumor emerges from inside his body which bursts open and flies come out of it and in the mayhem Barrow escapes from the hospital and heads to the high school. He performs minor surgery on himself closing his surgical wound with a stapler. Scott and his allies are on high alert, searching for him after Melissa and the Sheriff let him know of his "glowing eyes" statement. Barrow is able to disguise his scent using the chemicals he found in the chemistry lab, where he was able to hide from the werewolves trying to track him. Barrow had been left an unexplained coded message on a blackboard for him to kill Kira Yukimura. He shows up at the Yukimura residence knocking Scott unconscious and abducting Kira. He holds Kira hostage at his old power substation. He takes Kira's phone and takes pictures with the flash on it, exposing Kira's Kitsune nature. He subdues Scott who attempts to rescue Kira and he attempts to murder Kira by zapping her with a live electric wire. Kira is electrified, but the current doesn't harm or kill her, because she is a Thunder Kitsune. Her Foxfire talent manifests, blasting the electrical field and absorbing the gigawatts through her hands. Barrow was knocked aside from the blast, but wasn't seen again after that. It's currently unknown if Barrow was killed or knocked unconscious or if he was recaptured or is still on the run.

Its later revealed Barrow was controlled by the Nogitsune through the flies that were present in his body. The Nogitsune had maneuvered Barrow into activating Kira's Foxfire talent when Barrow made the move to kill her with a live wire, to super-charge the Void Kitsune's power and control over Stiles' body.

In "Silverfinger", Chris, along with Allison and Isaac track down Katashi for information regarding the samurai-like entities that have appeared in Beacon Hills. They deal with his private security, which included a werewolf named Kincaid, until Katashi calls them off after Chris shows him the very same broken mask Chris had shot off twenty-four years earlier. Silverfinger reveals that the beings are demons called the Oni and they are hunting for the dark, malevolent form of the Kitsune, the Nogitsune which possesses a host and draws its power from strife and chaos, pain and tragedy. He also reveals that the marks left on victims of the Oni is the Japanese kanji for self [己] indicating that said victim is still themselves and is not possessed by the Nogitsune. He declares to Chris that he owes him his life, his honor because when Chris saved his life from before as Katashi had intended to flee and according to Yakuza code he would've paid with his "head" for such an act of cowardice. Silverfinger concludes with a warning that if they have a Nogitsune amongst them, they should let the Oni destroy it. In the episode "Letharia Vulpina", Silverfinger is revealed to be murdered, supposedly by the Nogitsune and his death is blamed on by Derek and Chris when they got arrested.

After Katashi is found murdered, Kincaid raids the federal transport vehicle in "Echo House" containing all the evidence surrounding the murder including his silver prosthetic and takes the finger. Scott's allies confronts him saying they need the finger. Kincaid attempts to make a deal saying it's worth $3 million. When they demand the finger anyway, Kincaid takes the gang on, knocking Kira and Allison aside and beating Scott down, stating that the young werewolf has the eyes of an Alpha, but lacks the strength. Ethan and Aiden overpower Kincaid and almost kill him, but Scott orders them to spare him and takes the Shugendō scroll from the prosthetic, saying they're there to "save a life, not end one".

Haigh is seen in "Perishable", where he's tied Parrish's hands to his steering wheel of his cruiser. He pours gasoline over the car. Parrish is shocked at Haigh's actions. Haigh says Parrish is worth $5 million the Dead Pool. Parrish tries to talk him out of his actions, but Haigh throws gasoline on Parrish, throws in a lighter, setting him on fire. Haigh is seen at the station hoping to collect Parrish's bounty on his laptop, suddenly Parrish walks having survived the fire unharmed because of his unknown supernatural status. Parrish, out of anger, attacks Haigh and beats him into submission. Haigh is incarcerated afterward, and is in the interrogation room, confronted by Braeden in her US Marshall pose. She breaks his nose. Braeden learns from Haigh of the planned assassination of Scott, Liam and Malia at the school's annual lacrosse bonfire.

Sydney is seen in Season 5 "Parasomnia", in AP Biology along with Scott, Kira and Lydia when Mrs. Finch begins the class. In "Condition Terminal", in the same class, when Mrs. Finch is talking about multiple DNA sets in the same individual, and a mythological creature called a chimera that features such a phenomenon. Sydney pipes up saying the chimera is of Greek mythology and has both a lion and goat's heads and a snake for a tail. Mrs. Finch thanks her, but is not impressed by her reading the Wikipedia entry off her phone. In "Required Reading", in AP Biology, Sydney is seen stressed pulling roots of her hair out. Eventually she stands up, handing Mrs. Finch her signed drop form for the class. Mrs. Finch tells Sydney "Wise decision." Sydney then heads to Natalie's office. Lydia enters asking her is something wrong. She replies she's been losing her hair for three years because of stress, she's tried multiple methods to cope with it, including hypnotism, medication. Lydia offers to do something about her bald patch. Sydney shows her the spot, but then the banshee faints. Sydney immediately informs Natalie about her daughter.

Belasko's Chimera mutation was dominantly that of a werewolf. His right hand claws were actually the talons of a shapeshifter of Eastern mythology called a garuda, glowed blue and had the power to siphon power, life-force from other supernaturals.

In the first class of the year, Scott, Kira, Lydia and Sydney are in her class. She starts the class by checking who's awake. Lydia answers her first question, but is stumped by the following one. Mrs. Finch asks Scott his number one college choice. Scott answers UC, Davis. Mrs. Finch tells him he's in the right class if that's what he wants. Mrs. Finch announces the following test will help determine which students are in the wrong class, and they have two weeks to drop. In "Dreamcatchers", when students have the test scores returned, Mrs. Finch commends Scott that he has his priorities in order as he's returned his test score, 86% to his pleasure.

Stewart had tried to help Tracy with her night terrors. Tracy, due to her disorder, and her Chimera transformation, killed all the people who tried to assist her.

Scott and Melissa store Lucas' shapeshifted corpse in the hospital morgue. It's then taken by Parrish in a fugue state and brought by him to the Nemeton.

Sheriff Stillinski later discovers that Myers was an insurance investigator assigned to the Hale House fire and was fired for suspicion of fraud. Myers had been hired by Kate Argent cover up the fire as an accident. Right before he died, he apologized to Derek Hale.

It's later discovered that Reddick and Unger had multiple priors all over their records including arson. They were arsonists hired by Kate Argent to set the Hale House on fire.

Sheriff Stilinski later links their murders to the Hale fire. Unger, Reddick and the video store clerk killed by the Alpha werewolf back in the episode "The Tell" were all convicted arsonists.

Bennett was killed by the Kanima, on orders from his Master, Matt, because Bennett was involved in the incident in 2006 where Matt almost drowned when he was a little boy.

In "Fury", it's revealed Tucker was on Beacon Hills High swim team in 2006 and was present at the pool party where Matt Daehler almost drowned. Matt, as the Kanima's Master, had Tucker killed because he said Tucker 'murdered' him.

Sean was on the Beacon Hills High swim team in 2006. The team had just won state championship and was at their coach's Lahey's house to have some drinks and a pool party to celebrate, but Matt Daehler almost drowned in the pool and had the Kanima kill Sean because he didn't save him, stating Sean 'murdered' him.

It's revealed the Master is Matt Daehler, and he had her and Sean killed because they almost caused him to drown at a pool party where they were drunk when Matt was nine.

Kara was on the swim team for Beacon Hills' high school in 2006 and the team won state championship. The team had a pool party and drank alcohol to celebrate. A 9-year-old Matt Daehler was at the party and nearly drowned while the drunken team just laughed at him. Matt had the Kanima kill Kara because of the incident.

In Season 4, Satomi's Pack were all hiding, on the run from the Dead Pool, Lori herself being worth $250k. Lori and Brett were running for their lives from hunters-turned-assassins at night, but are saved by Kira. Lori along with Satomi, Brett and the rest of the Pack meet Scott, the True Alpha. Scott immediately has them all hide at the Argent Arms Int. warehouse. During the stand between Scott's allies and the assassins, Lori comes face-to-face with an assassin. Lori closes her eyes, but she is saved by Scott.

This girl's name and the culprit behind her death currently remain unknown.