| Episode |
Title |
Original airdate |
Production code |
| 01 |
"Metamorphosis" |
7 July 2006 |
101 |
| Emma, Cleo and Rikki, three different teenage girls, suddenly find they've got extraordinary power over water after a boat trip leaves them stranded on a mysterious island — but that's not all, they find that 10 seconds after they touch water, they grow tails! Their lives will change forever as they learn more about their own potential and the power of friendship. |
| 02 |
"Pool Party" |
14 July 2006 |
102 |
| Despite knowing what water can do, the temptation of Miriam's pool party proves too strong for Cleo and when she is nearly exposed, she must turn to Lewis for help. Also Rikki discovers her power. |
| 03 |
"Catch of the Day" |
21 July 2006 |
103 |
| Cleo does not share her friends' enthusiasm for their new-found abilities. Rikki and Emma's efforts to rescue sea turtles, trapped in fishing nets, causes a media frenzy about sharks patrolling the nearby waters. Believing her father to be involved, Cleo takes it upon herself to go after the boat responsible for the illegal fishing practices but finds herself caught up in a net. |
| 04 |
"Party Girls" |
28 July 2006 |
104 |
| Emma travels back to Mako Island where she finds a mysterious necklace at the bottom of the moonpool. The risks associated with Cleo's new job at the marine park give her friends cause for concern but Cleo's determination to lead a normal life helps convince Emma to set aside her own concerns and go ahead with her annual sleepover party. Lewis experiments to determine what will change the girls. Miss Chatham makes her first appearance. |
| 05 |
"Something Fishy" |
4 August 2006 |
105 |
| Cleo's secret diary falls into her sister's hands and Kim's suspicions quickly grow into a plot to expose Cleo and rest of the "evil mermaids" during the Miss Sea Queen pageant. Lewis travels to Mako Island to try to find out the cause of the girls' transformation. |
| 06 |
"Young Love" |
11 August 2006 |
106 |
| While babysitting Emma's brother Elliot, Rikki risks exposing her secret when he gets into trouble surfing. The girls turn to Lewis for advice when Elliot develops a crush on Rikki but the abrasive Rikki has a hard time letting him down gently, resulting in him running away. When Rikki finds him to apologise, however, she risks revealing the mermaid secret to him. |
| 07 |
"Moon Spell" |
18 August 2006 |
107 |
| Emma throws a birthday party for her dad, but forgets everything and loses her inhibitions when a full moon strikes. Additionally, her mermaid tail will not go away, and her friends must do everything they can to keep their secret. |
| 08 |
"The Denman Affair" |
25 August 2006 |
108 |
| The girls reluctantly agree to let Lewis get a research assistant's position with a marine biologist hoping to determine what's behind their transformation, but the girls have cause for concern when his enthusiasm brings him close to revealing too much information. After leaving behind a DNA sample from Cleo, Lewis is soon offered a lucrative job and has a choice to make about his future. |
| 09 |
"Dangerous Waters" |
1 September 2006 |
109 |
| Rikki lands a seemingly harmless job collecting rare fish, but when she learns the man who hired her does not work for the marine park but is instead a dealer selling the fish for big profits, she decides to take on the task of setting things right. |
| 10 |
"The Camera Never Lies" |
8 September 2006 |
110 |
| A short film contest on the subject of heroes captures the focus of the girls' attention, but a film about Emma's mother is not Rikki's idea of fun and she decides to use her abilities to capture some impressive underwater footage. Ineligible to compete himself, Zane recruits Lewis to document a recreation of his father's famous windsurfing trip to Mako Island. |
| 11 |
"Sink or Swim" |
15 September 2006 |
111 |
| Byron asks Emma for training help prior to the school swimming meet. After initially turning him down, she changes her mind but becomes a "heavy training dragon". Lewis continues his experiments on the girls but Rikki does not like being treated like a specimen and does her best to disrupt his research. |
| 12 |
"The Siren Effect" |
22 September 2006 |
112 |
| After a humiliating public karaoke performance, Cleo's sudden new-found singing ability on the night of a full moon gives her friends cause for concern. When she develops a mysterious Siren-like hold over boys, a sudden rush of admirers gives Cleo the audience she's dreamed of while her panicked father struggles to control the growing crowd. |
| 13 |
"Shipwrecked" |
28 September 2006 |
113 |
| When Zane causes the enigmatic Miss Chatham to be evicted from her boat, Emma invites her to stay at her home. Overhearing her concern for her "treasure", Zane chases after Miss Chatham seeking compensation for his damaged jet ski when she departs the marina in her boat. Emma and Lewis arrive in time to help with a medical emergency but when Zane gets trapped on the sinking boat, Emma must risk being seen as a mermaid to save him. |
| 14 |
"Surprise!" |
6 October 2006 |
114 |
| Cleo is counting the days until her sixteenth birthday, fully aware that her big day can only be ruined by one thing — another of her father's embarrassing birthday parties. Zane embarks on a hunt for the "sea monster" he saw when he nearly drowned and recruits Lewis to help, but Lewis has promised the girls to do everything he can to keep Zane well away from them and Mako Island. |
| 15 |
"The Big Chill" |
13 October 2006 |
115 |
| Emma is excelling at her new job at the JuiceNet café, but when Wilfred leaves her in charge for an entire weekend, her no-nonsense managerial style puts her at odds with her newest employee: Rikki. Miriam becomes the victim of her own scheming when Emma accidentally freezes her in the café's cool room forcing the girls to put aside their differences to defrost Miriam. |
| 16 |
"Lovesick" |
20 October 2006 |
116 |
| Cleo attracts the attention of a new dolphin at the marine park, but rumours about a new boyfriend have her family and friends determined to discover the identity of Cleo's mysterious beau. Meanwhile, Zane uses Cleo to gain access to the marine park's library to continue his sea monster research, while Cleo's family falls under the impression that she and Zane are going to run away and get married. |
| 17 |
"Under the Weather" |
27 October 2006 |
117 |
| A sudden thunderstorm forces the girls to feign illness to stay home from school, but in faking their symptoms too well, they attract the attention of doctors eager to study their "rare tropical disease". As the number of people in quarantine grows, Kim begins to suspect a ruse, but a more serious threat develops when a containment unit arrives to take the girls to a hospital for study. |
| 18 |
"Bad Moon Rising" |
3 November 2006 |
118 |
| Haunted by his encounter with the "sea monster", Zane steps up his investigation, which leads him to Mako Island. Rikki catches a glimpse of the full moon, causing her to lose control of her power. Rikki goes to Mako Island, and later Zane arrives. After they find each other on the island, Rikki kisses Zane, causing him to pass out from dehydration. Emma, Cleo and Lewis followed Rikki to Mako and find her sitting beside Zane, who has no memory of that day's events. |
| 19 |
"Hurricane Angela" |
10 November 2006 |
119 |
| The arrival of Cleo's cousin Angela is seen by the girl's father as an opportunity for Cleo to learn some maturity and responsibility. However, chaperoning a headstrong girl with a fondness for water quickly brings on its challenges. |
| 20 |
"Hook, Line and Sinker" |
17 November 2006 |
120 |
| Lewis' excitement about testing his new lure in the annual fishing derby is quelled by Cleo's refusal to renew their traditional partnership for fear of getting wet. Rikki and Zane encounter one another at a business seminar and get trapped on a balcony. The time alone together allows them to get to know one another better. Zane stands up to his father. |
| 21 |
"Red Herring" |
24 November 2006 |
121 |
| An innocent comment about her dependable nature convinces Emma she needs a change, so she decides to colour her hair. Zane's sea monster investigation leads him to Miss Chatham who he's convinced is at the centre of the mystery. Zane spots a mermaid with red hair, which is Emma getting the picture of Miss Chatham and her mermaid friends from the sunken boat. |
| 22 |
"Fish Out of Water" |
1 December 2006 |
122 |
| Rikki's date with Zane becomes a subject of speculation for Emma and Cleo. Concerned about Zane's trustworthiness, Emma gives Rikki an ultimatum: her and Cleo, or Zane. Harrison Bennett's unveiling of plans to develop Mako Island realigns feelings as Emma joins Rikki's vocal opposition and Zane takes a stand against his father. |
| 23 |
"In Too Deep" |
8 December 2006 |
123 |
| History may be repeating itself as Rikki's ability to keep the girls' secret is tested when she discovers a locket almost identical to Miss Chatham's in a jeweller's shop. She desperately wants the locket but is unable to tell Zane why it is so important. When Miriam buys it first, Rikki's fierce determination to get it back further draws out Zane's suspicions. |
| 24 |
"Love Potion #9" |
15 December 2006 |
124 |
| With the school dance approaching, Emma and Cleo are fretting about having to ask Byron and Lewis to go with them, relying on the boys to make the first move. But Byron does not ask Emma, who he thinks is too busy heading up the organising committee, and Lewis is too caught up in his work on a new scientific way to make it easier for the girls to be mermaids, by making them waterproof. |
| 25 |
"Dr Danger" |
22 December 2006 |
125 |
| The prospect of going on vacation to a resort with her family does not sit well with Emma and her excuses do not go over well with them. The return of marine biologist Dr Denman concerns Lewis and the girls but Zane sees a possible ally (or worse, a competitor) in the search for his mermaid. With Mako Island firmly in Denman's sights, the girls' secret is on the verge of being blown out of the water. |
| 26 |
"A Twist in the Tail" |
29 December 2006 |
126 |
| The hunt for the now identified mermaids intensifies as Dr Denman sets a trap for Cleo, Emma, and Rikki at Mako Island, forcing Zane to make a decision about where his loyalties lie: with his father or with the girls. A lunar eclipse also gives the girls an opportunity to free themselves from further pursuit by sacrificing their powers. While they are led to believe this is permanent, they eventually discover the effects of the lunar eclipse only last for twelve hours. |
| Episode |
Title |
Original airdate |
| 27 |
"Control" |
28 September 2007 |
| It's the night of a full moon, and all three girls accidentally see it. Under its spell, they swim to Mako Island, with Lewis in pursuit. The moon pool enhances their powers due to a special planetary alignment, with Rikki being able to control fire and lightning; Emma being able to control weather and freeze a whole room even though there's no water; and Cleo being able to create wind storms. Together they can create a powerful tempest. |
| 28 |
"Fire and Ice" |
5 October 2007 |
| Lewis has little success when he decides to test the girls' new and unpredictable powers. Emma helps her brother Elliot deal with a meddlesome teammate. Lewis' constant attention is driving Cleo crazy, leading to a frank discussion about their relationship. Meanwhile he meets Charlotte. |
| 29 |
"Double Trouble" |
12 October 2007 |
| Zane's reappearance forces Rikki to decide if staying away from him is what she really wants. Can Rikki become involved with Zane again and still keep her secret? As Lewis' new friendship with Charlotte grows to Cleo's dismay, so do Cleo's suspicions about her, but she insists it has nothing to do with jealousy. |
| 30 |
"Emma Rebel" |
19 October 2007 |
| With Emma's parents away for the weekend, Rikki comes over to stay but her behaviour rubs off on Emma decides to prove that she too can be a rebel. But is she trying too hard? And can she handle the consequences that come with throwing a party? Lewis tries to become more manly when Nate tells him it may have been why Cleo broke up with him. Cleo gets a secret admirer. |
| 31 |
"Hocus Pocus" |
26 October 2007 |
| When Lewis presents the girls with a rare book he discovered about mermaid mythology, Rikki and Emma reluctantly agree to help Lewis and Cleo make a potion that will give the girls the power to grant wishes. For Cleo it's an opportunity to reunite her fractured family, but when the project grows out of control, they must act quickly to clean up the café before Wilfred arrives to shoot a commercial. Charlotte is worried about Lewis spending time with Cleo as her crush on him grows stronger. |
| 32 |
"Pressure Cooker" |
2 November 2007 |
| Cleo becomes concerned with Lewis spending time with Charlotte. Lewis insists things between them aren't as they appear, but perhaps he needs to tell that to Charlotte, who is convinced that he's not over Cleo. To make matters worse, Cleo's dad has invited a woman over for dinner. And just when it appears that welcoming a potential stepmother is the worst of Cleo's troubles, she meets her daughter...Charlotte! When Lewis comes over to convince Cleo that there is nothing going on between Charlotte and him, Charlotte tries to convince Cleo that they are dating and flirts with Lewis. |
| 33 |
"In Hot Water" |
9 November 2007 |
| In need of money for a new computer, Lewis decides it is time he finds a job, and as luck would have it, a position becomes available at the aquarium when Cleo is fired. In an effort to help get Cleo her job back, Rikki and Emma set out to prove that serving ice-cream can be the hardest job in the world. But when the the aquarium's star attraction goes missing, Lewis becomes the prime suspect. |
| 34 |
"Wrong Side of the Tracks" |
16 November 2007 |
| Rikki is embarrassed to tell her friends and Zane where she lives. When Nate and Zane are out riding, Nate steals a tag off Rikki's father's motorbike. Zane is seen when Nate drives off. Zane pressures Rikki to let him meet her father. After much persuasion Rikki takes him to where she lives. He has no problem with it but when he leans in to kiss her, her father catches him and throws him out. |
| 35 |
"Riding for a Fall" |
23 November 2007 |
| Emma is forced to take her brother Elliot for riding lessons by her mother. She gets jealous of the riding instructor Ash because he is better than her. Ash asks Emma to leave his horse Rebel to graze and warns her not to let the horse graze on the front yard because of weeds but Rebel does without her seeing. Rebel is poisoned and Emma helps him recover by using her powers. Meanwhile, Lewis is nominated for a prize and accidentally invites both Cleo and Charlotte as his dates. |
| 36 |
"Unfathomable" |
30 November 2007 |
| Life may not be all about exams, but without Lewis as her study partner, academic success is proving elusive for Cleo. Fortunately, a new tutor is found to help, but is there an ulterior motive behind keeping Cleo busy studying? Meanwhile, the girls are concerned that Charlotte may also be getting too close to their secret — and it is Lewis who is leading the way, right to Mako Island. |
| 37 |
"Treasure Hunt" |
7 December 2007 |
| Pressured by tight family finances and the promise of a big reward, Rikki agrees to help Zane search the ocean floor for a valuable lost statue. But when she involves Emma and Cleo without telling them the full story, she finds herself alone in a dangerous situation when the truth comes out. Meanwhile, Lewis reassures the girls that he will still be there for them, but with Charlotte working to keep him to herself, he nearly misses a chance to help just when he is needed the most. |
| 38 |
"Monster" |
14 December 2007 |
| Emma develops a craving for seafood and a strange illness after cutting her finger on an unusual piece of coral. With Lewis kept busy helping the girls keep tabs on Emma, his date with Charlotte does not go particularly well and Charlotte is convinced Cleo is out to sabotage their relationship. |
| 39 |
"Camping on Mako Island" |
21 December 2007 |
| The revived Sertori family camping holiday is ill-fated not just by choice of location, Mako Island, but in the unfortunate timing of coinciding with the full moon. Cleo's friends tag along to help one another stay out of trouble but Lewis' plans are soon tested when the girls decide to face the powers of the full moon. Meanwhile, Charlotte's discovery of the moon pool at the height of the full moon may have unforeseen consequences. |
| 40 |
"Cleo vs. Charlotte" |
28 December 2007 |
| After confiding in her that she misses spending time with Lewis, Cleo takes Rikki's advice to re-establish her friendship with him and to embrace her unique abilities, after all, unlike Charlotte, Cleo is not just an ordinary girl. Emma is disappointed to be passed over for a promotion at work but is even more upset by the identity of her new supervisor and all of his changes to the café. |
| 41 |
"Irresistible" |
4 January 2008 |
| When he learns about myths considering ambergris, a substance which can control mermaids, Zane seeks the help of Lewis. But Lewis thinks nothing of it and throws the bottle away, falling into the wrong hands. Will the girls come to their senses before it's too late? |
| 42 |
"Visions" |
11 January 2008 |
| When Elliot asks Lewis for advice about girls, no one suspects who he plans to ask out on a date. Cleo and Lewis join the young couple on their first date to the water park and while it takes Elliot a bit longer to learn his lesson, the chaperones also come away a little wiser... and wetter. Emma gets the wrong idea about Rikki's secret meetings with Ash. Lewis is troubled by a reoccurring dream about Cleo being discovered as a mermaid. |
| 43 |
"Moonstruck" |
18 January 2008 |
| The full moon comes around again. When Ash has trouble asking Emma out, he comes round to surprise her. Meanwhile Cleo sees the moon and gets Rikki to see it as well. They lead Emma into the bathroom, where she sees the full moon too. Will Lewis arrive in time to save the mermaid secret? |
| 44 |
"The Heat is On" |
25 January 2008 |
| Cleo throws a party for the girls' first anniversary as mermaids. But not all goes as planned when Ash and Zane have a fight, resulting in Emma and Rikki falling out. Cleo wonders whether she will have to celebrate by herself. |
| 45 |
"The Gracie Code (Part One)" |
1 February 2008 |
| While looking research trying to uncover the secrets of the moon pool, Lewis uncovers the work of Max Hamilton, who fifty years earlier found himself in much the same role that Lewis is in now. To earn the old man's trust, Lewis risks betraying the girls' secret but the story Max has to tell will shed more light on the history of the moon pool and the girls' lockets. |
| 46 |
"The Gracie Code (Part Two)" |
8 February 2008 |
| Charlotte wants answers as to why Lewis is spending so much of his time with Cleo and the girls. Charlotte appears to be satisfied with Cleo's vague excuse that Lewis is helping them with a project, but her curiosity is piqued when, amongst Max's research papers, she spots an old photo of Gracie... her grandmother. Lewis is tasked with finding out exactly what Charlotte knows about her grandmother, but while looking for her own answers, Charlotte makes a startling discovery. Ash makes a well-intentioned attempt to help Emma overcome her apparent fear of water. |
| 47 |
"Then There Were Four" |
15 February 2008 |
| Charlotte's persistence in searching out her grandmother's murky past leads her to Max who confirms all of her suspicions. Further research leads her straight to the moon pool on Mako Island where secrets are revealed and another is born. Lewis' relationship with Charlotte is put to the test by his inability to confide in her but Charlotte has no such reservations. |
| 48 |
"Bubble Bubble Toil and Trouble" |
22 February 2008 |
| Against Rikki's better judgement, the girls agree to make Charlotte feel welcome as the newest member of the "mermaid club". Faced with the prospect of failing physical education in school due to avoiding water, the girls are quickly forced into working together with Charlotte when they find themselves together on the school's beach volleyball team. Charlotte learns there is more to being a mermaid than she thought and although the learning curve is steep, the final result is nothing short of 'super'. |
| 49 |
"Reckless" |
29 February 2008 |
| Concerned about Charlotte's ability to use her new-found powers wisely, the girls offer to help her learn about her powers, but Charlotte refuses their help and becomes determined to prove herself as the only true mermaid. When Lewis runs afoul of Nate, his pacifist nature causes Charlotte to come to his defence. Can she be stopped before she goes too far and exposes the group's secret? |
| 50 |
"Three's Company" |
7 March 2008 |
| Charlotte and the girls clash over the planning for Lewis' birthday. Tired of Charlotte's intrusion into what was once their close friendship group, Rikki excludes herself, promising Zane she'll spend more time with him instead. However, resolved to be the bigger person, Rikki decides to attend Lewis' party after all and arrives just in time to rescue her friends, who had been trapped in a storage closet by Charlotte. Instead of being at the party with all of Charlotte's friends, Lewis decides to hang out with Emma, Cleo, Rikki and all his friends from school. Charlotte's friendship with the other mermaids has come to an end. |
| 51 |
"Sea Change" |
14 March 2008 |
| Her short-lived friendship with the other girls is over and Charlotte demands that out of loyalty to her, Lewis is to have no more contact with Rikki, Emma and most of all, Cleo. Isolated and intimidated, Cleo runs away from home only to find herself in company with sharks. Determined to find Cleo, Lewis is forced to make a decision: obey Charlotte or help a friend. An easy decision as it turns out, but by choosing sides, a powerful enemy is created. |
| 52 |
"Finale" |
21 March 2008 |
| The full moon rises again, and Charlotte deliberatley looks at it and it makes her obsessed with revenge and determined to be the only mermaid, to make Lewis care about her more. Meanwhile the girls are at Emma's, trying to stay away from the moon, but then Charlotte comes near the house and starts "playing" with the water in Emma's house, just as Ash comes to visit her. Lewis convinces Charlotte to stop, and they go to Mako Island together. Cleo is worried about Lewis and follows them. Charlotte was waiting for her, because she realises what Lewis hasn't told her: that if there was any mermaid in the moon pool at the time the moon was passing over it, that mermaid would lose her powers forever! Emma and Rikki arrive in time to save Cleo. They fight with Charlotte and, after falling into the moon pool, she loses her powers. Emma finally reveals to Ash that she is a mermaid. |
