• 
  Jefery Levy

  regizor
• 
  Stephen Surjik

  regizor

• 
  Colin Ferguson

  Sheriff Jack Carter
• 
  Salli Richardson-Whitfield

  Allison Blake
• 
  Jordan Hinson

  Zoe Carter
• 
  Joe Morton

  Henry Deacon
• 
  Erica Cerra

  Deputy Jo Lupo
• 
  Ed Quinn

  Nathan Stark

• 
  Laura Mennell

  dr. Rivers
• 
  Elysia Rotaru

  Teri Wallace
• 
  Stan Lee

  dr. Lee
• 
  Grant Imahara
• 
  Chris Parnell

  dr. Noah Drummer
• 
  Zak Santiago

  Dr. Sebastian Marx (1 episode, 2008)
• 
  Gabrielle Rose

  Carol Taylor (2 episodes, 2007-2008)

• 
  Leela Savasta

  Julia Golden (1 episode, 2009)
• 
  David Richmond-Peck

  Dr. Hendricks (1 episode, 2008)
• 
  Yvonne Myers
• 
  D. Harlan Cutshall

  GD Demo Team Leader (1 episode, 2009)
• 
  Holly Elissa

  Dr. Tracy Fox (1 episode, 2008)
• 
  Malcolm Stewart

  Rick Wallace (1 episode, 2008)
• 
  Karissa Tynes

  Stephanie (2 episodes, 2007)
• 
  Nicholas Carella

  Leo Weinbrenner (1 episode, 2008)
• 
  Michael Benyaer

  Dr. Louis Glazer (1 episode, 2006)
• 
  Jeff Pangman

  Duncan (2 episodes, 2009)
• 
  Chelah Horsdal

  Mary-Beth Curtis (1 episode, 2009)
• 
  Sean O. Roberts

  Toby Bismarck (1 episode, 2009)
• 
  Jody Racicot

  Doctor Peterson (1 episode, 2008)
• 
  David Lewis

  Dr. Aaron Finn (1 episode, 2007)
• 
  Michael Kopsa

  Doctor (2 episodes, 2007)
• 
  Shayn Solberg

  Spencer Martin (7 episodes, 2006)
• 
  Ty Olsson

  Sheriff Andy (1 episode, 2009)
• 
  Tyronne L'Hirondelle
• 
  Iris Paluly

  Home Owner (1 episode, 2007)
• 
  Woody Jeffreys

  Bob Knob (1 episode, 2008)
• 
  Jennifer Spence

  Dr. Monroe (1 episode, 2009)
• 
  Greg Germann

  Warren King (1 episode, 2006)
• 
  Billy Campbell

  Dr. Bruce Manlius (1 episode, 2009)
• 
  Maury Chaykin

  Major William Cobb  (1 episode, 2006)
• 
  Samuel Patrick Chu

  Putnam (1 episode, 2006)
• 
  Julia Arkos
• 
  Lexa Doig

  Dr. Anne Young (2 episodes, 2007-2008)
• 
  Kurt Max Runte

  Agent Turner (1 episode, 2009)
• 
  Carmen Moore

  Dr. Childress (1 episode, 2007)
• 
  Tanya Champoux
• 
  Sarah Hayward
• 
  Alan Ruck

  Dr. Hood (1 episode, 2008)
• 
  Lossen Chambers
• 
  Amber Borycki

  Cybernetic Fairy (1 episode, 2006)
• 
  Colin Foo

  Scientist Teaching Zoe #1 (1 episode, 2006)
• 
  Kwesi Ameyaw

  Special Agent Hicks (1 episode, 2006)
• 
  Jaime Ray Newman

  Tess Fontana (6 episodes, 2009)
• 
  Garry Chalk

  Colonel Briggs (1 episode, 2006)
• 
  Michael Bean
• 
  Michael Shanks

  Christopher Dactylos (1 episode, 2007)
• 
  Rob Hayter
• 
  Jennifer Crystal

  Tabitha (1 episode, 2009)
• 
  Olivia d'Abo

  Dr. Abby Carter (2 episodes, 2007)
• 
  Matt Frewer

  Jim Taggart (13 episodes, 2006-2009)
• 
  Darryl Scheelar

  Ranger Tom (1 episode, 2009)
• 
  Barclay Hope

  Gen. Mansfield (5 episodes, 2007-2009)
• 
  Frances Fisher

  Eva Thorne (8 episodes, 2008)
• 
  Michael Brock

  Jasper Cole (2 episodes, 2007)
• 
  Barbara Eve Harris

  Reverend Harper (1 episode, 2007)
• 
  Debrah Farentino

  Beverly Barlowe (14 episodes, 2006-2007)
• 
  Martin Christopher

  Doctor (3 episodes, 2007-2009)
• 
  Stephen Park
• 
  Heather Doerksen

  Woman #2 (1 episode, 2009)
• 
  Saul Rubinek

  Dr. Carl Carlson (1 episode, 2006)
• 
  Fulvio Cecere

  Jake Wyatt (1 episode, 2007)
• 
  Tyler McClendon

  Young Corporal (1 episode, 2006)
• 
  Jay Brazeau
• 
  Aleks Paunovic

  Global Security Officer (1 episode, 2006)
• 
  Bill Mondy

  Sam Lovejoy (1 episode, 2007)
• 
  Niall Matter

  Zane Donovan (17 episodes, 2007-2009)
• 
  Patrick Gilmore

  Pete Puhlman (1 episode, 2007)
• 
  Alex Diakun
• 
  Shawn Macdonald

  Dr. Mendel (1 episode, 2008)
• 
  Allison Hossack

  Dr. Emily Glenn (1 episode, 2007)
• 
  Nhi Do

  Zoe's Friend #2 (1 episode, 2007)
• 
  Adrian Hough

  Dr. Wilding (1 episode, 2008)
• 
  Donna White

  Eugenia (1 episode, 2006)
• 
  Andrew Airlie

  Jason Anderson (1 episode, 2006)
• 
  Patricia Harras

  Laura Wallace (1 episode, 2008)
• 
  Anna Galvin

  Dr. Jane Harrington (1 episode, 2007)
• 
  Kaley Cuoco

  Leighton (1 episode, 2008)
• 
  Garwin Sanford

  Congressman Faraday (2 episodes, 2006-2007)
• 
  Sonja Bennett

  Callie Curie (3 episodes, 2007)
• 
  Matreya Fedor

  Tina (1 episode, 2007)
• 
  Patrick Keating
• 
  Scott Hylands

  Andre Sandrov (1 episode, 2007)
• 
  Tamlyn Tomita

  Kim Anderson  (5 episodes, 2006-2009)
• 
  Christopher Jacot

  Larry Haberman (10 episodes, 2007-2009)
• 
  Colin Cunningham

  Dr. Paul Suenos (1 episode, 2007)
• 
  Bridget Hoffman

  Computer Voice  (5 episodes, 2008-2009)
• 
  Jennifer Clement

  Susan Perkins (2 episodes, 2006)
• 
  Teryl Rothery

  Diane Lancaster (1 episode, 2007)
• 
  Jillian Fargey

  Dr. Ashe (1 episode, 2009)
• 
  Kirsten Robek

  Mina (1 episode, 2008)
• 
  David Quinlan

  Dr. Milton Houk (1 episode, 2006)
• 
  Rukiya Bernard

  IT Technician (1 episode, 2006)
• 
  Paul Christie

  Dr. Ryan Brock (1 episode, 2007)
• 
  Chris Gauthier

  Vincent (35 episodes, 2006-2009)
• 
  Terence Kelly

  Charlie (1 episode, 2007)
• 
  Richard Ian Cox

  Dr. Bob Stone (1 episode, 2007)
• 
  Layla Alizada

  Dr. Sharat (1 episode, 2006)
• 
  Meshach Peters

  Kevin Blake  (10 episodes, 2006-2008)
• 
  Reese Alexander

  Security Officer (1 episode, 2007)
• 
  John DeSantis

  Big Ed (1 episode, 2009)
• 
  Daniel Boileau
• 
  Glynis Davies

  Toaster Owner (1 episode, 2009)
• 
  Tygh Runyan

  Pierre Fargo (1 episode, 2007)
• 
  Stefanie von Pfetten

  Wendy Whiticus (1 episode, 2007)
• 
  Kim Poirier

  Dr. Maria Leonardo (1 episode, 2009)
• 
  Rob LaBelle

  Walter Perkins (2 episodes, 2006)
• 
  Maria Luisa Cianni

  Miss Nelson (1 episode, 2007)
• 
  Jonathon Young

  Dr. Ethan Edison (1 episode, 2008)
• 
  Adrienne Carter

  Pilar (4 episodes, 2007-2008)
• 
  Mark Hildreth

  Chuck (1 episode, 2008)
• 
  Brendan Beiser

  Dr. Drechmeyer (1 episode, 2009)
• 
  Anna Cummer

  EMT Nurse (1 episode, 2007)
• 
  Alan Legros

  Seth Osbourne (3 episodes, 2006-2009)
• 
  David Paetkau

  Callister Raynes (1 episode, 2006)
• 
  Jocelyne Loewen

  Doris Gilmer  (2 episodes, 2006)
• 
  Ever Carradine

  Lexi Carter (8 episodes, 2008-2009)
• 
  Benjamin B. Smith

  Oppenheimer (1 episode, 2006)
• 
  Neil Grayston

  Douglas Fargo