Colin Ferguson
Jack Carter (18 eps)
Salli Richardson-Whitfield
Allison Blake (18 eps)
Joe Morton
Henry Deacon (18 eps)
Erica Cerra
Jo Lupo (18 eps)
Neil Grayston
Douglas Fargo / S.A.R.A.H. (18 eps)
Jordan Danger
Zoe Carter (18 eps)
Niall Matter
Zane Donovan (18 eps)
Ed Quinn
Nathan Stark (18 eps)
Matt Frewer
Jim Taggart (18 eps)
Frances Fisher
Eva Thorne (18 eps)
Chris Gauthier
Vincent (18 eps)
Vanya Asher
Lucas (18 eps)
Christopher Jacot
Larry Haberman (18 eps)
Jaime Ray Newman
Tess Fontana (18 eps)
Adrienne Carter
Pilar (18 eps)
Bridget Hoffman
Computer (5 eps)
Barclay Hope
Gen. Mansfield (3 eps)
Tamlyn Tomita
Kim Anderson (2 eps)
Leela Savasta
Julia Golden (2 eps)
Jeff Pangman
Duncan (2 eps)
Alan Ruck
Dr Hood (1 eps)
Meshach Peters
Kevin Blake (1 eps)
Alan Legros
Seth Osbourne (1 eps)
Gabrielle Rose
Carol Taylor (1 eps)
Paul Moniz de Sa
Lincoln (1 eps)
Jonathon Young
Dr. Ethan Edison (1 eps)
Kirsten Robek
Mina (1 eps)
Elysia Rotaru
Teri Wallace (1 eps)
Richard Kahan
Derek Bowers (1 eps)
Malcolm Stewart
Rick Wallace (1 eps)
Woody Jeffreys
Bob Nobb (1 eps)
Jax Smith
Grace (1 eps)
Neil Schell
Abe (1 eps)
Patricia Harras
Laura Wallace (1 eps)
Chad Riley
Guard (1 eps)
Holly Dignard
Dr. Tracy Fox (1 eps)
Shawn Macdonald
Dr. Mendel (1 eps)
Kayla Deorksen
Sales Lady (1 eps)
Nicholas Carella
Leo Weinbrenner (1 eps)
Zak Santiago
Dr. Sebastian Marx (1 eps)
Adrian Hough
Dr. Wilding (1 eps)
Tricia Collins
Eileen Michaels (1 eps)
Mark Hildreth
Chuck (1 eps)
Jody Racicot
Doctor Peterson (1 eps)
David Mackay
Doctor Gaz (1 eps)
Dean Marshall
Dr. Herrera (1 eps)
Kaaren de Zilva
Doctor Lee (1 eps)
Margot Berner
Kylie (1 eps)
Jonathan Nichols
Announcer (1 eps)
Jay Brazeau
Captain Yuri Gregor (1 eps)
David Richmond-Peck
Dr. Hendricks (1 eps)
Julius Chapple
Guard (1 eps)
Kim Poirier
Dr. Maria Leonardo (1 eps)
Kurt Max Runte
Agent Turner (1 eps)
Tobias Slezak
Dr. Jacob Stefano (1 eps)
Julia Arkos
Dr. Bella Pagani (1 eps)
Brendan Beiser
Dr. Drechmeyer (1 eps)
Chelah Horsdal
Mary-Beth Curtis (1 eps)
Mark Gash
H.J. Johnson (1 eps)
Rachel Gassi
The Dress Lady (1 eps)
Nicholas Longstaff
The Mail Carrier (1 eps)
Sean Owen Roberts
Toby Bismarck (1 eps)
John DeSantis
John DeSantis (1 eps)
Wanda Ayala
Researcher (1 eps)
Eric Hempsall
Dr. Wyman (1 eps)
Jennifer Crystal Foley
Tabitha (1 eps)
Darryl Scheelar
Ranger Tom (1 eps)
D. Harlan Cutshall
GD Demo Team Leader (1 eps)
Ben Geldreich
Dr. Lieber (1 eps)
Glynis Davies
Toaster Owner (1 eps)
Heather Doerksen
Woman #2 (1 eps)
Billy Campbell
Dr. Bruce Manlius (1 eps)
Laura Mennell
Dr. Rivers (1 eps)
Stefanie Samuels
Dr. Draper (1 eps)
Jennifer Spence
Dr. Monroe (1 eps)
Meredith McGeachie
Dr. Bell (1 eps)
Richard Side
Dr. Kinnison (1 eps)
Stacey Bendfelt
GD Gym Manager (1 eps)
Jillian Fargey
Dr. Ashe (1 eps)
Andrew Cownden
Dr. Bubay (1 eps)
Martin Christopher
Doctor Reviving Jake (1 eps)
Lexa Doig
Dr. Anne Young (1 eps)
Kevin Kruchkywich
Dr. Fielding (as Kevin James) (1 eps)
Ty Olsson
Deputy Andy / Sheriff Andy (1 eps)