| Actor |
Character |
Episode appearance(s) |
| Phil Morris |
Martian Manhunter |
"Bizarro", "Cure" |
| This season, he assisted Clark in disposing of the bizarro version of Clark, while preparing Clark to complete the training he began in "Arrival". |
|
| Michael Cassidy |
Grant Gabriel/Julian Luthor |
"Kara", "Fierce", "Action", "Wrath", "Blue", "Gemini", "Persona" |
| The new editor of the Daily Planet, and and a new love interest for Lois Lane. It was also revealed that he is clone of Julian Luthor.[1] |
|
| Terence Stamp |
Jor-El |
"Kara", "Blue", "Persona", "Apocalypse" |
| Clark returns to Jor-El to finish his training, but upon hearing of Kara's arrival, Jor-El instructs Clark to watch over her. Jor-El's explanation is that Zor-El, his brother and Kara's father, could not be trusted with Krypton's salvation, and thus neither can Kara. |
|
| Kim Coates |
Federal Agent Carter |
"Kara", "Fierce", "Lara" |
| A federal agent, working for the Department of Domestic Security, who steals Kara's ship. When he tries to open the ship it sets off a self-destruct sequence. Arriving back at the federal office, he carries with him a Kryptonian crystal left from the ship. |
|
| Christine Chatelain |
Tempest Grace |
"Fierce"[2] |
| A contestant in the Miss Sweet Corn Pageant, she and her friends were caught in a storm during the last meteor shower. The kryptonite rocks gave her the ability to create windstorms. She is after a map that will lead her and her friends to buried treasure. |
|
| Elisa King |
Carly |
"Fierce"[2] |
| A contestant in the Miss Sweet Corn Pageant, she and her friends were caught in a storm during the last meteor shower. She is killed by Tempest after it is revealed that she has plans to double cross her friends and take the treasure for herself. |
|
| Eva Marcille |
Tyler Crenshaw |
"Fierce"[2] |
| A contestant in the Miss Sweet Corn Pageant, she and her friends were caught in a storm during the last meteor shower. The kryptonite rocks gave her the ability to create sub-zero temperatures by touch. She witnesses Kara using her abilities and later convinces her to join the quest to find the treasure. |
| Michael Rosenbaum |
Alexander Luthor |
"Fracture" |
| Lex Luthor's clone/evil double, returns. [3] |
|
|
| Dean Cain |
Dr. Curtis Knox |
"Cure"[2] |
| An immortal who is trying to give the woman he loves the chance to live forever alongside him. To accomplish his goal, he targets metahumans with high concentrations of kryptonite in particular organs, which he would then transplant into his wife's body. When Chloe comes to him to be "cured", Dr. Knox discovers that her heart is the one he has been looking for. Clark intervenes before Knox can kill Chloe, and John Jones imprisons him in an undisclosed location. |
|
| Christina Milian |
Rachel Davenport |
"Action"[2] |
| The lead actress in the film adaptation of Warrior Angel. Clark saves her from a car crash. After some researching by Chloe, it is discovered that someone is trying to kill Rachel, because they believe her character should die, like she does in the comics. |
|
| Helen Slater |
Lara |
"Lara", "Blue"[2] |
| Clark's biological mother.[4] |
|
| James Marsters |
Milton Fine/Brainiac |
"Persona", "Veritas", "Apocalypse", "Arctic" |
| An old nemesis of Clark's returns.[5] |
|
| Justin Hartley |
Oliver Queen/Green Arrow |
"Siren" |
| [6] |
|
| Alaina Huffman |
Dinah Lance/Black Canary |
"Siren" |
| Lex sends the Black Canary after the Green Arrow and his team, convincing her that they are terrorists. The Black Canary can deliver an "inaudible cry" to her opponent, and Chloe, who is working with the Green Arrow, is attacked by the Canary[6] |
|
| Sam Jones III |
Pete Ross |
"Hero" |
| After ingesting kryptonite-enhanced gum, he develops elastic abilities. He uses these abilities to be a super hero with a warped sense of justice. He loses the abilities after he stops eating the gum. |
|
