There are two CLARK KENTs. One is the young man whose life in a tiny Kansas town sets him on destiny's path. The other is a BIZARRO who shares Clark's DNA but not his values. Only one of them can survive. SUPERMAN mythology grows deeper and more powerful in an event-packed season that includes the arrival of Clark's cousin KARA/SUPERGIRL. Keep a low profile and master your powers, Clark says. Kara has other ideas. Plus: LANA LANG might prefer Bizarro to the real deal. LOIS LANE makes a career leap. CHLOE SULLIVAN finds that balancing a meteor power with a personal life isn't easy. And LEX LUTHOR's power-lust has a new fixation Kara.
Episode List:
1. Bizarro
2. Kara
3. Fierce
4. Cure
5. Action
6. Lara
7.Wrath
8. Blue
9. Gemini
10. Persona
11. Siren
12. Fracture
13. Hero
14. Traveler
15. Veritas
16. Descent
17. Sleeper
18. Apocalypse
19. Quest
20. Arctic
| Tom Welling | Clark Kent |
| Michael Rosenbaum | Lex Luthor |
| Kristin Kreuk | Lana Lang |
| Allison Mack | Chloe Sullivan |
| Erica Durance | Lois Lane |
| Aaron Ashmore | Jimmy Olsen |
| Laura Vandervoort | Kara |
| John Glover | Lionel Luthor |
| Phil Morris | John Jones |
| Conrad Coates | Keating |
| Quinn Lord | Possessed Boy |
| Jake D. Smith | Boy Fishing at Dam |
| Heath Stevenson | Man Fishing at Dam |
| Marci T. House | ER Nurse |
| Jacqueline Samuda | ER Doctor |
| Suzanne Bastien | ER Doctor |
| Randal Edwards | EMT |
| Anna Galvin | Doctor |
| Tosha Doiron | Lex's Assistant |
| David Patrick Green | Truck Driver |
| Michael Cassidy | Grant Gabriel |
| Kim Coates | Government Agent |
| Terence Stamp | the Voice of Jor-El |
| Tom McBeath | Lex's Lawyer |
| Peter Bryant | Lex's Assistant |
| Dean Redman | Policeman |
| Dawson Dunbar | Cody |
| Jamie Schwanebeck | Kid at Playground |
| Theresa Lee | Lab technician |
| Richard Keats | Doctor |
| Eva Marcille | Tyler Crenshaw |
| Christine Chatelain | Tempest Grace |
| Robert Thurston | Emcee |
| Peter LaCroix | Sheriff |
| Elisa King | Carly |
| Brittaney Bennett | Contestant |
| Kayla Laturnus | Contestant |
| Ildiko Ferenczi | Contestant |
| Sahar Biniaz | Contestant |
| Emily Bruhn | Contestant |
| Leona Pelletier | Contestant |
| Dean Cain | Dr. Curtis Knox |
| Jovanna Huguet | Sasha Woodman |
| Natalia Minuta | Sophia |
| Jason Poulsen | Jimmy's friend |
| Christina Milian | Rachel Davenport |
| Christopher Jacot | Ben |
| Nancy Sivak | Marilyn |
| David Richmond-Peck | Director |
| Morgan Brayton | Marilyn |
| Georgia Hacche | Lex's Assistant |
| Rob Daly | |
| Christina Schild | Reporter |
| Karen Holness | Reporter |
| Andre Danke | |
| Helen Slater | Lara |
| Christopher Heyerdahl | Zor-El |
| Chris Kelly | Technician |
| Heather Doerksen | Isis Receptionist |
| Kristian Bakstad | |
| Anna Louise Sergeant | Lab Assistant |
| Alex Zahara | Dr. Jansen |
| Elyse Levesque | Casey Brock |
| Jacqueline Micallef | Nurse |
| Angela Moore | Detroit Waitress |
| Mike Ennis | EMT |
| Patricia Cullen | Daily Planet Reporter |
| Tim Guinee | Adrian Cross |
| Jason Diablo | Delivery Man |
| Doreen Ramus | Mail Delivery Woman |
| Marc McClure | Dax-Ur |
| James Marsters | Milton Fine |
| Howard Siegel | Homeless Man |
| Connor Levins | Max |
| Sharlene Martin | Grace |
| Tyler Hazelwood | Mugger |
| Alaina Huffman | Dinah Lance / Black Canary |
| Justin Hartley | Oliver Queen |
| Alisen Down | Lillian Luthor |
| Corey Sevier | Finley |
| Connor Stanhope | Young Lex |
| David Orth | Doctor |
| Robert Gauvin | |
| Sam Jones III | Pete Ross |
| Mark Wynn | Lex's Bodyguard |
| Andrew Fallows | Deejay |
| OneRepublic | Themselves |
| Gina Holden | Patricia Swann |
| Aaron Douglas | Pierce |
| Reese Alexander | Bodyguard |
| Nick Hunnings | Assistant |
| Jonathan Scarfe | Robert Queen |
| Rick Ravanello | Edward Teague |
| Luke Gair | Young Oliver Queen |
| Owen Best | Young Jason Teague |
| Conner Dwelly | Young Patricia Swann |
| Mike Denis | Male Nurse |
| David Lovgren | Lionel's Henchman |
| Bud the Dog | Shelby |
| Jill Teed | Captain Maggie Sawyer |
