List of cast members

Main Cast

• Colin Ferguson as Jack Carter (77 episodes, 2006-2012)
• Salli Richardson-Whitfield as Allison Blake (77 episodes, 2006-2012)
• Erica Cerra as Jo Lupo / ... (77 episodes, 2006-2012)
• Neil Grayston as Douglas Fargo / ... (77 episodes, 2006-2012)
• Joe Morton as Henry Deacon (76 episodes, 2006-2012)
• Chris Gauthier as Vincent / ... (67 episodes, 2006-2012)
• Jordan Hinson as Zoe Carter (50 episodes, 2006-2012)
• Niall Matter as Zane Donovan (50 episodes, 2007-2012)

Recurring Cast

• Ed Quinn as Nathan Stark (32 episodes, 2006-2012)
• Debrah Farentino as Beverly Barlowe (25 episodes, 2006-2012)
• Tembi Locke as Grace Monroe (24 episodes, 2010-2012)
• Christopher Jacot as Larry Haberman (24 episodes, 2007-2012)
• Kavan Smith as Deputy Andy 2.0 / ... (21 episodes, 2010-2012)
• Felicia Day as Holly Marten (18 episodes, 2011-2012)
• Matt Frewer as Jim Taggart (18 episodes, 2006-2012)
• Trevor Jackson as Kevin Blake (16 episodes, 2010-2012)
• Jaime Ray Newman as Tess Fontana (12 episodes, 2009-2010)
• Vanya Asher as Lucas (12 episodes, 2007-2009)
• Wil Wheaton as Isaac Parrish (12 episodes, 2010-2012)
• James Callis as Dr. Trevor Grant / ... (10 episodes, 2010-2012)
• Meshach Peters as Kevin Blake (10 episodes, 2006-2008)
• Frances Fisher as Eva Thorne (9 episodes, 2008-2009)
• Ever Carradine as Lexi Carter (8 episodes, 2008-2009)
• Barclay Hope as Gen. Mansfield (8 episodes, 2007-2010)
• Shayn Solberg as Spencer Martin (8 episodes, 2006-2009)
• Ming-Na Wen as U.S. Senator Michaela Wen (7 episodes, 2011-2012)
• Adrienne Carter as Pilar (6 episodes, 2007-2010)
• Jackie Gonneau as Computer Voice / ... (6 episodes, 2011-2012)
• Bryan Wilson as Baker Twin #2 / ... (6 episodes, 2006-2012)
• Keith Wilson as Baker Twin #1 / ... (6 episodes, 2006-2012)
• Tamlyn Tomita as Kim Anderson / ... (5 episodes, 2006-2009)

Guest actors

• Wesley Salter as Technician / (5 episodes, 2010-2012)
• Bridget Hoffman as Computer Voice / (5 episodes, 2008-2009)
• Martin Cummins as Dekker (4 episodes, 2011-2012)
• Jordenn Thompson as Jenna / (4 episodes, 2012)
• Paula Lindberg as Neural Engineer #1 / (4 episodes, 2011-2012)
• Roger Cross as Major William Shaw (3 episodes, 2012)
• Sonja Bennett as Callie Curie (3 episodes, 2007)
• Alan Legros as Seth Osbourne (3 episodes, 2006-2009)
• Wallace Shawn as Dr. Warren Hughes / (3 episodes, 2011-2012)
• Nevaeh Kidd as Jenna Blake (3 episodes, 2011-2012)
• Elias Toufexis as Adam Barlowe (3 episodes, 2010)
• Martin Christopher as Doctor / (3 episodes, 2007-2009)
• Leo Li Chiang as GD Section 5 Guard / (3 episodes, 2011-2012)
• Olivia d'Abo as Dr. Abby Carter (2 episodes, 2007)
• Chris Parnell as Dr. Noah Drummer (2 episodes, 2010-2011)
• Ty Olsson as Deputy Andy / (2 episodes, 2009-2010)
• Leela Savasta as Julia Golden (2 episodes, 2009)
• Jeff Pangman as Duncan (2 episodes, 2009)
• Noah Danby Major Ryan (2 episodes, 2010)
• Craig Anderson as Dr. Nick Fowler (2 episodes, 2012)
• Garwin Sanford as Congressman Faraday (2 episodes, 2006-2007)
• Robert Clarke as Larry the IT Guy (2 episodes, 2006)
• Rob LaBelle as Walter Perkins (2 episodes, 2006)
• Lexa Doig as Dr. Anne Young (2 episodes, 2007-2008)
• Jennifer Clement as Susan Perkins (2 episodes, 2006)
• Gabrielle Rose as Carol Taylor (2 episodes, 2007-2008)
• Kim Poirier as Dr. Maria Leonardo (2 episodes, 2009-2011)
• Michael Brock as Jasper Cole (2 episodes, 2007)
• Ben Ratner as Dr. Fung (2 episodes, 2011-2012)
• Paul Moniz de Sa Paul as Lincoln (2 episodes, 2007-2008)
• Andrew Cownden as Chem Tech / (2 episodes, 2009-2012)
• Alex Ferris as Boy / (2 episodes, 2010-2011)
• Zak Ludwig as Brian Perkins (2 episodes, 2006)
• Marie West as Singer (2 episodes, 2010)
• Raugi Yu as GD Tech / (2 episodes, 2007-2010)
• Michael Kopsa as Doctor (2 episodes, 2007)
• Karissa Tynes as Stephanie (2 episodes, 2007)
• Paul Lazenby as MP / (2 episodes, 2010)
• Isaiah Adam as Soldier / (2 episodes, 2010)
• Cameron Park as Doctor / (2 episodes, 2007)
• Sharon Taylor as Stark's Doctor / (2 episodes, 2007)
• Rif Hutton as Astraeus Computer / (2 episodes, 2011-2012)
• Ileeya Brown as Jenna (2 episodes, 2012)
• Jocelyne Loewen as Doris Gilmer / (2 episodes, 2006)
• Nico Cortez as Jo's Dad (2 episodes, 2011-2012)
• Christina Sicoli as Desperate Citizen / (2 episodes, 2011-2012)
• Greg Germann as Professor Warren King (1 episode, 2006)
• Billy Campbell as Dr. Bruce Manlius (1 episode, 2009)
• Antony Holland as Dr. Irvin Thatcher (1 episode, 2006)
• Tygh Runyan as Pierre Fargo (1 episode, 2007)
• Richard Side as Dr. Kinnison (1 episode, 2009)
• Allison Scagliotti as Claudia Donovan (1 episode, 2010)
• Stan Lee as Dr. (Generalissimo) Lee (1 episode, 2011)
• Dondre Whitfield as Dr. Marcus Blake (1 episode, 2012)
• Andrew Airlie as Jason Anderson (1 episode, 2006)
• David Paetkau as Callister Raynes (1 episode, 2006)
• Vincent Gale as Dr. Todd (1 episode, 2007)
• Anna Galvin as Dr. Jane Harrington (1 episode, 2007)
• Scott Hylands as Andre Sandrov (1 episode, 2007)
• Teryl Rothery as Diane Lancaster (1 episode, 2007)
• Alan Ruck as Dr. Hood (1 episode, 2008)
• Jillian Fargey as Dr. Ashe (1 episode, 2009)
• Ben Geldreich as Dr. Lieber (1 episode, 2009)
• Eugene Byrd as Dr. Michael Clark (1 episode, 2012)
• Michael Coleman as Pizza Dude (1 episode, 2006)
• Saul Rubinek as Dr. Carl Carlson (1 episode, 2006)
• Tom Tames as Dylan Hartwell (1 episode, 2006)
• Donna White as Eugenia (1 episode, 2006)
• Elise Gatien as Megan (1 episode, 2007)
• Patrick Gilmore as Pete Puhlman (1 episode, 2007)
• Allison Hossack as Dr. Emily Glenn (1 episode, 2007)
• Michael Shanks as Christopher Dactylos (1 episode, 2007)
• Brendan Beiser as Dr. Drechmeyer (1 episode, 2009)
• Glynis Davies as Toaster Owner (1 episode, 2009)
• Eric Hempsall as Dr. Wyman (1 episode, 2009)
• Laura Mennell as Dr. Rivers (1 episode, 2009)
• Aaron Douglas as Dr. Ray Darlton (1 episode, 2011)
• Donavon Stinson as Dr. Max Dillon (1 episode, 2011)
• Maury Chaykin as Major William Cobb / (1 episode, 2006)
• Samuel Patrick Chu as Putnam (1 episode, 2006)
• Arthur Corber as Scientist in Explosion (1 episode, 2006)
• David Quinlan as Dr. Milton Houk (1 episode, 2006)
• Fulvio Cecere as Jake Wyatt (1 episode, 2007)
• Barbara Eve Harris as Reverend Harper (1 episode, 2007)
• Terence Kelly as Charlie (1 episode, 2007)
• Bill Mondy as Sam Lovejoy (1 episode, 2007)
• Syn Narula as Dr. Babajanian (1 episode, 2007)
• Stefanie von Pfetten as Wendy Whiticus (1 episode, 2007)
• Nicholas Carella as Leo Weinbrenner (1 episode, 2008)
• Holly Elissa as Dr. Tracy Fox (1 episode, 2008)
• Chelah Horsdal as Mary-Beth Curtis (1 episode, 2009)
• Sean Owen Roberts as Toby Bismarck (1 episode, 2009)
• Stefanie Samuels as Dr. Draper (1 episode, 2009)
• Tobias Slezak as Dr. Jacob Stefano (1 episode, 2009)
• Olivia Cheng as Dr. Lisa Wheeler (1 episode, 2010)
• Rocky Anderson as Helicopter Pilot (1 episode, 2011)
• Andrew McNee as Huggins (1 episode, 2011)
• Forbes Angus as Dr. Selikoff (1 episode, 2012)
• Aliyah O'Brien as Female Driver (1 episode, 2012)
• Michael Benyaer as Dr. Louis Glazer (1 episode, 2006)
• Rukiya Bernard as IT Technician (1 episode, 2006)
• Colin Foo as Scientist Teaching Zoe #1 (1 episode, 2006)
• Aaron Isaacs as Walter Perkins (1 episode, 2006)
• Ryan Vrba as Puck (1 episode, 2006)
• Deirdre Blades as Belle St. John (1 episode, 2007)
• Colin Cunningham as Dr. Paul Suenos (1 episode, 2007)
• Ed Hong-Louie as Man at Bar (1 episode, 2007)
• David Lewis as Dr. Aaron Finn (1 episode, 2007)
• David Nykl as Dr. Steven Whiticus (1 episode, 2007)
• Don Thompson as Victor (1 episode, 2007)
• Mark Hildreth as Chuck (1 episode, 2008)
• Dean Marshall as Dr. Herrera (1 episode, 2008)
• Elysia Rotaru as Teri Wallace (1 episode, 2008)
• Zak Santiago as Dr. Sebastian Marx (1 episode, 2008)
• Jonathon Young as Dr. Ethan Edison (1 episode, 2008)
• Julia Arkos as Dr. Bella Pagani (1 episode, 2009)
• Jay Brazeau as Captain Yuri Gregor (1 episode, 2009)
• Jennifer Crystal Foley as Tabitha (1 episode, 2009)
• Mark Gash as H.J. Johnson (1 episode, 2009)
• Jennifer Spence as Dr. Monroe (1 episode, 2009)
• Keegan Connor Tracy as Dr. Viccelli (1 episode, 2010)
• Graeme Duffy as Dr. Norman Gregor (1 episode, 2011)
• Quinn Lord as Young Zane (1 episode, 2011)
• Edward James Olmos as First sled dog (1 episode, 2011)
• Debbie Timuss as Officer (1 episode, 2011)
• Revard Dufresne as Guard (1 episode, 2012)
• Layla Alizada as Dr. Sharat (1 episode, 2006)
• Amber Borycki as Cybernetic Fairy (1 episode, 2006)
• John Burnside as Scientist Teaching Zoe #2 (1 episode, 2006)
• Garry Chalk as Colonel Briggs (1 episode, 2006)
• Sean Devine as Bus Driver (1 episode, 2006)
• Yvonne Myers as Global Dynamics Human Resource Counselor (1 episode, 2006)
• Aleks Paunovic as Global Security Officer (1 episode, 2006)
• Gary Sekhon as Kellor (1 episode, 2006)
• Richard Arndt as someone (1 episode, 2007)
• Eileen Barrett as Judy Stone (1 episode, 2007)
• Adam Bergquist as Mr. Hall (1 episode, 2007)
• Brenda Crichlow as Principal Wallace (1 episode, 2007)
• Carmen Moore as Dr. Childress (1 episode, 2007)
• Margot Berner as Kylie (1 episode, 2008)
• Adrian Hough as Dr. Wilding (1 episode, 2008)
• Richard Kahan as Derek Bowers (1 episode, 2008)
• David Richmond-Peck as Dr. Hendricks (1 episode, 2008)
• Kirsten Robek as Mina (1 episode, 2008)
• Kevin Kruchkywich as Dr. Fielding (1 episode, 2009)
• Meredith McGeachie as Dr. Bell (1 episode, 2009)
• Jonathan Nichols as Announcer (1 episode, 2009)
• Darryl Scheelar as Ranger Tom (1 episode, 2009)
• Michelle Harrison as Lily Morgan (1 episode, 2010)
• Ava Hughes as Girl (1 episode, 2010)
• John Reardon as Dr. Derek Thergood (1 episode, 2010)
• Ben Wilkinson as Dr. Anson (1 episode, 2010)
• Cameron Bancroft as Dad (1 episode, 2011)
• Luke Camilleri as Dr. Welke (1 episode, 2011)
• Dave Foley as Dr. Plotkin (1 episode, 2011)
• Natalie Gibson as Panicked Patron (1 episode, 2011)
• Ellie Harvie as Dr. Sanagustin (1 episode, 2011)
• Pablo Silveira as Tech #2 (1 episode, 2011)
• Fane Tse as Candidate #1 (1 episode, 2011)
• John Paul McGlynn as Med Tech (1 episode, 2012)
• Erin Simms as Young Scientist (1 episode, 2012)
• Mark Burgess as Man Getting Ticket (1 episode, 2006)
• Alex Diakun as (1 episode, 2006)
• Randal Edwards as Lab Tech (1 episode, 2006)
• Nathan Kelly as (1 episode, 2006)
• Daryl Shuttleworth as Global Security Tactical Commander (1 episode, 2006)
• Kenneth W. Yanko as Lt. General (1 episode, 2006)
• James Ashcroft as Male Nurse (1 episode, 2007)
• Paul Christie as Dr. Ryan Brock (1 episode, 2007)
• Richard Ian Cox as Dr. Bob Stone (1 episode, 2007)
• Matreya Fedor as Tina (1 episode, 2007)
• Sarah Hayward as Madame (1 episode, 2007)
• Tyronne L'Hirondelle as (1 episode, 2007)
• Steve Makaj as Rudolph (1 episode, 2007)
• Kevin O'Grady as Technician (1 episode, 2007)
• Julius Chapple as Guard (1 episode, 2008)
• Tricia Collins as Eileen Michaels (1 episode, 2008)
• Shawn Macdonald as Dr. Mendel (1 episode, 2008)
• Jody Racicot as Doctor Peterson (1 episode, 2008)
• Malcolm Stewart as Rick Wallace (1 episode, 2008)
• D. Harlan Cutshall as GD Demo Team Leader (1 episode, 2009)
• John DeSantis as Big Ed (1 episode, 2009)
• Rachel Gassi as The Dress Lady (1 episode, 2009)
• Stephanie Belding as Dr. Tanya Zimmer (1 episode, 2010)
• Stacee Copeland as GD Nurse (1 episode, 2010)
• Jamie Kennedy as Dr. Ramsey (1 episode, 2010)
• Kathryn Kirkpatrick as Patient (1 episode, 2010)
• Norman Misura as Irate Customer (1 episode, 2010)
• Jill Morrison as Supply Clerk (1 episode, 2010)
• Matthew Thiessen as Scientist #1 (1 episode, 2010)
• Darren Dolynski as Dr. Boyle (1 episode, 2011)
• Nicholas Elia as Young Parrish (1 episode, 2011)
• Andrew Coghlan as Grief Tech #1 (1 episode, 2012)
• Justin Kim as Medic (1 episode, 2012)
• Sunita Prasad as Boxed Hand Tech (1 episode, 2012)
• C. Douglas Quan as Dr. Horikoshi (1 episode, 2012)
• J.R. Messado as Kevin Blake (1 episode, 2006)
• Graham Young as Unidentified (1 episode, 2006)
• Michael Bean as Husband (1 episode, 2007)
• Maria Luisa Cianni as Miss Nelson (1 episode, 2007)
• Rob Hayter as FBI Agent #2 (1 episode, 2007)
• Sean Millington as Global Security Officer (1 episode, 2007)
• Iris Paluly as Home Owner (1 episode, 2007)
• Stephen Powell as Unidentified (1 episode, 2007)
• Kayla Doerksen as Sales Lady (1 episode, 2008)
• Woody Jeffreys as Bob Nobb (1 episode, 2008)
• David Mackay as Doctor Gaz (1 episode, 2008)
• Stacey Bendfelt as GD Gym Manager (1 episode, 2009)
• Kurt Max Runte as Agent Turner (1 episode, 2009)
• Kameron Louangxay as Scientist #2 (1 episode, 2010)
• Fiona Vroom as GD Employee (1 episode, 2010)
• Marie Avgeropoulos as Bonnie (1 episode, 2011)
• Peter Kelamis as Dr. Mark Timmons (1 episode, 2011)
• Peter Ciuffa as Grief Tech #2 (1 episode, 2012)
• Patricia Isaac as Med Tech (1 episode, 2012)
• Jeffrey Kaiser as GD Tech NPC (1 episode, 2012)
• Laura Adkin as Cheerleader #1 (1 episode, 2006)
• Alison Araya as Parishioner (1 episode, 2007)
• Jordan Asch as(1 episode, 2007)
• Lossen Chambers as Nurse (1 episode, 2007)
• Max Fomitchev as Neil Baxter (1 episode, 2007)
• Paul Herbert as Epigeneticist (1 episode, 2007)
• Eric Hui as Medical Doctor (1 episode, 2007)
• Daniel Pepper as D.O.D. Agent (1 episode, 2007)
• Kaaren de Zilva as Doctor Lee (1 episode, 2008)
• Jax Smith as Grace (1 episode, 2008)
• Chad Bellamy as GD Guard - Frank (1 episode, 2010)
• Dalias Blake as Construction Worker #1 (1 episode, 2010)
• Don Hastings as Baseball Game Announcer (1 episode, 2010)
• Alex Hospes as Cookie Eating Boy (1 episode, 2010)
• Phillip Mitchell as Soldier #1 (1 episode, 2010)
• Keenan Tracey as Jake (1 episode, 2010)
• Max Boateng as Nurse (1 episode, 2011)
• Aubrey Tennant as Balloon Man (1 episode, 2011)
• Grant Imahara as EMO Robot Scientist (1 episode, 2012)
• Jason Poulsen as Dr. Wells (1 episode, 2012)
• Katie Chapman as Cheerleader #2 (1 episode, 2006)
• Reese Alexander as Security Officer (1 episode, 2007)
• Dorla Bell as Zoe's Friend #3 (1 episode, 2007)
• Patrick Keating as (1 episode, 2007)
• David Stuart as Pharmacist (1 episode, 2007)
• Neil Schell as Abe (1 episode, 2008)
• Bella King as Jessica Lansky (1 episode, 2010)
• Jerry Rector as Construction Worker #2 (1 episode, 2010)
• Joel Semande as Male Student (1 episode, 2010)
• Blaine Anderson as Candidate (1 episode, 2011)
• Dan Clarke as Faux-Bama (1 episode, 2011)
• Tammy Hui as Teacher (1 episode, 2011)
• Demord Dann as GD Guard NPC (1 episode, 2012)
• Jonathan Holmes as Consortium #1 (1 episode, 2012)
• Troy Rudolph as Crewman Tuchman (1 episode, 2012)
• Elizabeth Thai as Dr. Yoo (1 episode, 2012)
• Matt McInnis as Young Thatcher (1 episode, 2006)
• Benjamin B. Smith as Oppenheimer (1 episode, 2006)
• Daniel Boileau as Man Arguing with Wife (1 episode, 2007)
• Anna Cummer as EMT Nurse (1 episode, 2007)
• Dave Leach as Marco Polo #1 (1 episode, 2007)
• Patricia Harras as Laura Wallace (1 episode, 2008)
• Nickolas Baric as MP #1 (1 episode, 2010)
• Christie Burke as College Girl (1 episode, 2010)
• Finn Michael as Scientist (1 episode, 2010)
• Harrison Xu as Tesla Kid #1 (1 episode, 2010)
• Tina Milo Milivojevic as Scientist #1 (1 episode, 2011)
• Kevin Mundy as Military Guard (1 episode, 2011)
• Geoff Gustafson as Dr. Tuchman (1 episode, 2012)
• Ian Carter as Chief Marshal (1 episode, 2006)
• Tyla Gagnon as Young Eugenia (1 episode, 2006)
• Tanya Champoux as Woman Arguing with Husband (1 episode, 2007)
• Nhi Do as Zoe's Friend #2 (1 episode, 2007)
• J.B. McEown as Kid in Park (1 episode, 2007)
• Stephen Park as Marco Polo #2 (1 episode, 2007)
• Aleksandra Rea as Spa Attendant (1 episode, 2007)
• Tiara Sorensen as Sweater Girl (1 episode, 2010)
• Todd Mason as Scientist #2 (1 episode, 2011)
• Jonathan Potts as Dr. Curtis Ward (1 episode, 2011)
• Sarah Afful as Cop (1 episode, 2012)
• Matthew Hastings as Robert the Moving Boss (1 episode, 2012)
• Kwesi Ameyaw as Special Agent Hicks (1 episode, 2006)
• Aaron Rota as Man In Yellow Shirt (1 episode, 2006)
• Storma as Media Store Clerk (1 episode, 2007)
• Eddie Frierson as Radio Announcer (1 episode, 2010)
• Jessica Gonzales as Young Jo (1 episode, 2011)
• Christina Jastrzembska as Old Woman (1 episode, 2012)
• Leanne Merrett as Special Agent Miller (1 episode, 2006)
• Nancy J. Lilley as Upset Wife (1 episode, 2007)
• Chris Burns as Buzz (1 episode, 2006)
• Alison Raine as Woman in Purple Sweater (1 episode, 2007)
• Nico McEown as Rico (1 episode, 2011)
• Viv Leacock as Array Guard #1 (1 episode, 2012)
• Tyler McClendon as Young Corporal (1 episode, 2006)
• Donna Yamamoto as Woman Arguing with Friend (1 episode, 2007)
• Peter Bundic as Eddie (1 episode, 2011)
• Jason Griffith as Array Guard #2 (1 episode, 2012)
• Alexander Kambolis as Juan (1 episode, 2011)
• Kevin D. Murray as Charley (1 episode, 2006)
• Michelle Creber as Radical Racoon Teammate (1 episode, 2011)
• Michael Warren Choi as Awesome Possum #1 (1 episode, 2011)
• Tessamay Hartley as Awesome Possum #2 (1 episode, 2011)
• Alyssia Ellis as Awesome Possum #3 (1 episode, 2011)
• Laura Jaye as Woman (1 episode, 2007)
• Chad Riley as Guard (1 episode, 2008)
• Wanda Ayala as Researcher (1 episode, 2009)
• Heather Doerksen as Woman #2 (1 episode, 2009)
• Nicholas Longstaff as The Mail Carrier (1 episode, 2009)
• Seth Robert Dusky as Additional voices (1 episode, 2011)
• Jim Parsons as Carl the Jeep (1 episode, 2011)
• Peter Brown as Med Tech (uncredited) (9 episodes, 2012)
• Damon Winters as Field Scientist (uncredited) (2 episodes, 2011)
• Christopher Ang as Interrogatee (uncredited) (1 episode, 2006)
• Chris Becker as Darren (uncredited) (1 episode, 2006)
• Sean Kohnke as Researcher #1 (uncredited) (1 episode, 2006)
• Mike Vardy as Lab Employee (uncredited) (1 episode, 2006)
• Bonnie Smart as Female Tech (uncredited) (1 episode, 2007)
• Jaime Paglia as I.S.S. Crew (uncredited) (1 episode, 2011)
• Nathan Lehfeldt as DOD Attaché (uncredited) (1 episode, 2012)