- Peter Weller
- Â Chuck Taggart 19 episodes, 2002-2003
- Sebastian Roché
- Â Kurt Mendel 19 episodes, 2002-2003
- Christopher Gorham
- Â Neil Taggart 19 episodes, 2002-2003
- Leslie Silva
- Â Sarah Forbes 19 episodes, 2002-2003
- Tamara Marie Watson
- Â Angela Perry 19 episodes, 2002-2003
- Gina Clayton
- Â Paige Taggart 12 episodes, 2002-2003
- Jim Codrington
- Â Troy Johnson 12 episodes, 2002-2003
- Amari Myles
- Â Corey Forbes 11 episodes, 2002-2003
- Phillip Jarrett
- Â Paul Forbes 10 episodes, 2002-2003
- Kenneth Mitchell
- Â Marc Taggart 9 episodes, 2002
- Sonja Smits
- Â Cynthia Hodge 7 episodes, 2002-2003
- Lindy Booth
- Â Holly Culverson 7 episodes, 2002-2003
- Jonathan Higgins
- Â Chad Daniels 6 episodes, 2002-2003
- Edie Inksetter
- Â Waitress 6 episodes, 2002
- Barry Flatman
- Â Senator Brian Perry 5 episodes, 2002-2003
- Michèle Duquet
- Â Claire Ambrose 4 episodes, 2003
- J. Adam Brown
- Â Wade 4 episodes, 2002
- Clé Bennett
- Â Dr. Leshawn 4 episodes, 2002-2003
- Vladimir Jon Cubrt
- Â P.A. Freddie 4 episodes, 2002-2003
- Lesley Dowey
- Â Eliza Murphy 4 episodes, 2002-2003
- Sandi Ross
- Â Mary Forbes 3 episodes, 2002
- Jon Langford
- Â Bodanis 3 episodes, 2002
- Mat Langford
- Â Kelsey 3 episodes, 2002
- Chantal Quesnelle
- Â Kayli Haynes 3 episodes, 2003
- Damon D'Oliveira
- Â Dr. Naran Chandra 3 episodes, 2002-2003
- Nicholas Carella
- Â Diaz 3 episodes, 2002
- Geoffrey Lewis
- Â Leyton Scott 2 episodes, 2002-2003
- Jean Yoon
- Â Dr. Lynn Chen 2 episodes, 2002-2003
- Craig Eldridge
- Â Matt Walsh 2 episodes, 2002
- Victoria Snow
- Â Jenny Taggart 2 episodes, 2002-2003
- Kim Roberts
- Â Dr. Egrari 2 episodes, 2002
- Kyle Schmid
- Â Zack Ambrose 2 episodes, 2003
- Matt Birman
- Â Commander / ... 2 episodes, 2002
- Lynda Mason Green
- Â Candace Scott 2 episodes, 2002-2003
- Eric Hempsall
- Â Man with Baseball Hat / ... 2 episodes, 2002
- Tracy Waterhouse
- Â Fraiser / ... 2 episodes, 2002
- Patrice Goodman
- Â Cheryl Johnson 2 episodes, 2002-2003
- Mo Kelso
- Â Cheryl 2 episodes, 2002
- Elvira Sanchez de Malicki
- Â Antonia Reyes 2 episodes, 2002
- Devon Bostick
- Â Gothic Teen / ... 2 episodes, 2002-2003
- Alex Appel
- Â Kayley 2 episodes, 2002
- Katia Corriveau
- Â Hooker On Top / ... 2 episodes, 2002
- Peter Sawyer
- Â Communications Officer / ... 2 episodes, 2002
- John Henry Canavan
- Â Longshoreman #1 1 episode, 2003
- Conrad Pla
- Â Paul Nieves 2 episodes, 2002
- Jeff Geddis
- Â Ethan Slattery 1 episode, 2003
- George Buza
- Â Matther Pollard / ... 2 episodes, 2002
- Derwin Phillips
- Â Guard #1 / ... 2 episodes, 2002
- Chantal Cousineau
- Â Female Grad Student 2 episodes, 2002
- Rick Worthy
- Â Dr. Travelor / ... 1 episode, 2002
- Enuka Okuma
- Â Karen Reigns / ... 1 episode, 2002
- Bronson Picket
-  Enrique Peña 1 episode, 2002
- Frank Chiesurin
- Â Gus Hagen 1 episode, 2003
- John Neville
- Â The Seeker 1 episode, 2002
- Dominic Zamprogna
- Â Justin Deckard 1 episode, 2002
- Ron White
- Â Mr. Taggart 1 episode, 2002
- Sherry Miller
- Â Detective 1 episode, 2003
- Ted Raimi
- Â Harry Mudd 1 episode, 2002
- Brandon McGibbon
- Â Fisher Newton Jr. 1 episode, 2002
- Trulie MacLeod
- Â Marianne Perry 1 episode, 2002
- Armelle Mazeau
- Â Nurse 1 episode, 2003
- Robert Bockstael
- Â Norbert Manson 1 episode, 2002
- Gary Reineke
- Â Old Man 1 episode, 2002
- Fiona Highet
- Â Female FBI Agent 1 episode, 2003
- Ian Downie
- Â Bruce Seligson 1 episode, 2003
- Nola Augustson
- Â Stern Woman 1 episode, 2002
- Tedde Moore
- Â Video Shrink 1 episode, 2002
- Mark McAuley
- Â Presenter 1 episode, 2002
- Richard Blackburn
- Â Ed Scrivens 1 episode, 2002
- Wayne Ward
- Â Male FBI Agent 1 episode, 2003
- David Eisner
- Â Dr. Hammond 1 episode, 2003
- John Friesen
- Â Lowell 1 episode, 2003
- K.C. Collins
- Â Chavo 1 episode, 2002
- Philip Williams
- Â Gerald Wilkerson 1 episode, 2002
- Leilene Ondrade
- Â Whipped Girl 1 episode, 2002
- Sarah Plommer
- Â Shari 1 episode, 2002
- David Jansen
- Â Carlton Frazier 1 episode, 2002
- Andrew Sabiston
- Â Braun 1 episode, 2003
- Tony De Santis
- Â Intensive Care Doctor 1 episode, 2003
- Suzanne McKenney
- Â Penny 1 episode, 2003
- Maria Vacratsis
- Â Elaine Wilkerson 1 episode, 2002
- Chris Britton
- Â Dr. Estes 1 episode, 2002
- Lizz Alexander
- Â Sherri 1 episode, 2002
- Christopher Lee Clements
- Â Gym Guy 1 episode, 2002
- Karl Campbell
- Â Inmate #1 1 episode, 2002
- Donna Goodhand
- Â Kathleen Ashbury 1 episode, 2003
- Neville Edwards
- Â Police Chief 1 episode, 2003
- Alexa Gilmour
- Â Gus' Sister 1 episode, 2003
- Arnold Pinnock
- Â Music Executive 1 episode, 2002
- Jane McLean Guerra
- Â Dr. Janice Kitaro 1 episode, 2002
- Bobby Johnston
- Â Warren Sunn 1 episode, 2002
- Andrew Wheeler
- Â Inmate #2 1 episode, 2002
- Michael Rubenfeld
- Â Audio Guy 1 episode, 2003
- Judy Sinclair
- Â Elderly Woman 1 episode, 2003
- Christopher Bondy
- Â Dr. Peter Egan 1 episode, 2003
- Roger Barnes
- Â Ravin Official 1 episode, 2003
- Maria Ricossa
- Â Allison Webber 1 episode, 2002
- Doug Lennox
- Â Roger Mason 1 episode, 2002
- Andrea Davis
- Â Female Executive 1 episode, 2002
- Robert Morelli
- Â District Attorney 1 episode, 2002
- Jean Daigle
- Â Detective Culver 1 episode, 2002
- George Tsioutsioulas
- Â News Anchor 1 episode, 2002
- Ming Bastien
- Â Stevie 1 episode, 2002
- Raven Dauda
- Â Marie Chessler 1 episode, 2003
- Deborah Grover
- Â Adel Jones 1 episode, 2003
- Francis X. McCarthy
- Â Dr. John Steiger 1 episode, 2003
- Catherine Black
- Â Young Paige 1 episode, 2003
- Angela Gei
- Â Mrs. Nicholson 1 episode, 2003
- Dean McKenzie
- Â Jim Calson 1 episode, 2002
- Sophie Bennett
- Â Brianna Mason 1 episode, 2002
- Peter Van Wart
- Â Dr. Barantz 1 episode, 2002
- Oliver Becker
- Â Suspicious Man 1 episode, 2002
- Kathryn Haggis
- Â Virginia Leonard 1 episode, 2002
- John Stoneham Jr.
- Â Synth #2 1 episode, 2002
- Damien Atkins
- Â Junior Executive 1 episode, 2002
- Don Ritchie
- Â Deckard's Dad 1 episode, 2002
- Bill Vibert
- Â Dr. Palmer 1 episode, 2002
- James Gonzalez
- Â Detective Salzana 1 episode, 2002
- Lucas Bryant
- Â Young Chuck Taggart 1 episode, 2003
- Peter Spence
- Â David Hovic 1 episode, 2003
- Craig Gardner
- Â Army General 1 episode, 2003
- Dallas Chorley
- Â Kelly Jones 1 episode, 2003
- Tony Holme
- Â Groundskeeper 1 episode, 2003
- Faith Salie
- Â Voice of Kitten 1 episode, 2002
- Robert Seeliger
- Â Martin Phillips 1 episode, 2002
- Nigel Shawn Williams
- Â Dr. Alex Stratton 1 episode, 2002
- Bobby Manning
- Â Muscular Gangster 1 episode, 2002
- Troy P. Liddell
- Â Security Guard 1 episode, 2002
- Rory O'Shea
- Â TV Correspondent 1 episode, 2002
- Eric Cabral
- Â Isaac Sussman 1 episode, 2002
- Rogelio Gudino
- Â Latina Leader 1 episode, 2002
- Lynne Griffin
- Â Dr. Ellie Woodruff 1 episode, 2003
- Larissa Gomes
- Â Candy 1 episode, 2003
- Jillian Rees-Brown
- Â Bitty Welsh 1 episode, 2003
- Erin Davis
- Â Sandra Lewis 1 episode, 2003
- Timothy Burd
- Â Luther 1 episode, 2002
- David Collins
- Â John Meadows 1 episode, 2002
- Matt Cooke
- Â Longshoreman #2 1 episode, 2003
- Michael Kanevsky
- Â Richie Lewis 1 episode, 2003
- Padraigin Murphy
- Â Angry Teenage Daughter 1 episode, 2003
- Andrew Gillies
- Â Casper Van Dyke 1 episode, 2002
- Philip Akin
- Â Hesseman 1 episode, 2002
- Kiran Friesen
- Â Julie 1 episode, 2002
- Martin Doyle
- Â Dr. Jamison 1 episode, 2002
- Danielle Hampton
- Â Skye 1 episode, 2002
- Gloria Slade
- Â Simmonds 1 episode, 2002
- Bruce Gooch
- Â Roadside Bartender 1 episode, 2002
- Otto Chung
- Â Controller #2 1 episode, 2002
- Michael Filipowich
- Â Sam Jakowski 1 episode, 2003
- Robert B. Kennedy
- Â Steve 1 episode, 2003
- William Colgate
- Â Detective 1 episode, 2003
- Jonathan Potts
- Â Albert Harper 1 episode, 2002
- Gord Rand
- Â NASA Tech 1 episode, 2002
- Marc Minardi
- Â Sci-Fi Kid 1 episode, 2002
- Drew Coombs
- Â Paramedic 1 episode, 2002
- Jamie Robinson
- Â Gonzales 1 episode, 2002
- Simon Breton
- Â Anthony 1 episode, 2002
- Gail Ordogh
- Â Cleaning Lady 1 episode, 2002
- Catherine McNally
- Â Carla 1 episode, 2003
- Roman Podhora
- Â Whalens 1 episode, 2003
- Stewart Arnott
- Â Dr. John Bertran 1 episode, 2003
- Michael Facciolo
- Â Charlie 1 episode, 2003
- Patrick Salvagna
- Â Kid #1 1 episode, 2003
- Brian Paul
- Â Carl Saunders 1 episode, 2002
- Francesca Scorsone
- Â Secretary 1 episode, 2002
- Sten Eirik
- Â Mr. Wittig 1 episode, 2002
- Grace Armas
- Â Cleaning Lady 1 episode, 2002
- Eliza Jane Scott
- Â Waitress 1 episode, 2002
- Don Retzer
- Â Music Executive #2 1 episode, 2002
- Charmain Lawrence
- Â Monica Stern 1 episode, 2002
- Zoe Doyle
- Â Barrista 1 episode, 2003
- Kirsten Kieferle
- Â Heather Grossman 1 episode, 2003
- Jef Mallory
- Â Guest Speaker 1 episode, 2003
- Ardon Bess
- Â Congressman Reddling 1 episode, 2003
- Joshua Watkis
- Â Kid #2 1 episode, 2003
- Zoie Palmer
- Â Researcher 1 episode, 2002
- Joanne Boland
- Â Tatianna Korviskova 1 episode, 2002
- Roberta Angelica
- Â Stunning Woman 1 episode, 2002
- Ron Kennell
- Â Tracker #2 1 episode, 2002
- John Nelles
- Â Judge Garvey 1 episode, 2002
- Roger Peterson
- Â Anchor 1 episode, 2002
- Jocelyn Lai
- Â Girl Student 1 episode, 2002
- Amber Borde
- Â Hoodrat Girl #1 1 episode, 2002
- Henry Chan
- Â Store Owner 1 episode, 2003
- Emanuel Arruda
- Â Barrista #2 1 episode, 2003
- Nick Johne
- Â Transhumanist #1 1 episode, 2003
- Lamont Brown
- Â Teen Driver 1 episode, 2003
- Kathleen Duborg
- Â Mrs. Hess 1 episode, 2002
- Angelica Lisk-Hann
- Â Paramedic's Girlfriend 1 episode, 2002
- Lorry Ayers
- Â Correspondent 1 episode, 2002
- Nicole Crimi
- Â Tulip 1 episode, 2002
- Kent Staines
- Â Synthetic #1 1 episode, 2002
- Paul A. MacFarlane
- Â Night Watchman 1 episode, 2002
- Natasha Radetic
- Â Hoodrat Girl #2 1 episode, 2002
- Walter Bolton
- Â Elderly Man 1 episode, 2002
- Fulvio Cecere
- Â Polansky 1 episode, 2003
- Riley Jones
- Â Mendel's Synth #1 1 episode, 2003
- Charles Seminerio
- Â Transhumanist #2 1 episode, 2003
- Katya Gardner
- Â Lynda Kessel 1 episode, 2002
- Bill MacDonald
- Â Dr. Spitzer 1 episode, 2002
- Tommy Chang
- Â Kwon's Programmer 1 episode, 2002
- Olivia Jones
- Â Synthetic #2 1 episode, 2002
- Tony Craig
- Â Detective 1 episode, 2002
- Sean Wayne Doyle
- Â TV Announcer 1 episode, 2002
- Austin Schatz
- Â Chaplain 1 episode, 2002
- Howard Hoover
- Â Howard Longe 1 episode, 2003
- Robert Racki
- Â Synth #1 1 episode, 2003
- Bryan J. Thomas
- Â Mendel's Synth #2 1 episode, 2003
- Ann Turnbull
- Â Dr. Geller 1 episode, 2003
- Denis Akiyama
- Â Akegi 1 episode, 2002
- Rhys Williams
- Â Boy 1 episode, 2002
- Marvin Karon
- Â Dr. Reynolds 1 episode, 2002
- Carolyn Goff
- Â Tessa 1 episode, 2002
- Michael Colonnese
- Â Kid #1 1 episode, 2002
- John Andersen
- Â Anchor #2 1 episode, 2002
- Scott Yaphe
- Â Synth #2 1 episode, 2003
- B.J. McQueen
- Â Trucker 1 episode, 2003
- Alison Smith
- Â Nurse 1 episode, 2003
- Bree Williamson
- Â Kid #2 1 episode, 2002
- Richard Fitzpatrick
- Â Bureaucrat 1 episode, 2002
- Tig Fong
- Â Security Guard 1 episode, 2002
- Miku Graham
- Â Nurse 1 episode, 2002
- Kaya McGregor
- Â Patricia Lyndon 1 episode, 2002
- John Watson
- Â Security Guard #1 1 episode, 2002
- Rick Sood
- Â Hindu Priest 1 episode, 2003
- Tia Cardoza
- Â Computer Kid #2 1 episode, 2003
- Jenny Cooper
- Â Realtor 1 episode, 2002
- Elizabeth Lennie
- Â Teacher 1 episode, 2002
- Shakira Harper
- Â Paul's Assistant 1 episode, 2002
- Jerri-Lynne Smith
- Â Janine Kealey 1 episode, 2002
- Jamall Whitter
- Â Computer Kid #3 1 episode, 2003
- Christine Brubaker
- Â Speaker 1 episode, 2002
- Dash Grundy
- Â Tree Child 1 episode, 2002
- Sarah Drake
- Â Hearing Impaired Child 1 episode, 2002
- Ron Van Hart
- Â Security Guard 1 episode, 2003
- Taryn Ash
- Â Female Agent 1 episode, 2002
- Geraldine Ronan
- Â Mrs. Kealey 1 episode, 2002
- Branko Racki
- Â Driver 1 episode, 2003
- Amanda Farrace
- Â Computer Kid #5 1 episode, 2003
- Erin Simms
- Â Stacia 1 episode, 2002
- Chad Camilleri
- Â Trucker 1 episode, 2002
- Brendan Connor
- Â Reporter 1 episode, 2002
- Leslie Carlson
- Â Ruckner 1 episode, 2002
- Edward A. Queffelec
- Â Security Guard 1 episode, 2002
- Daneen Boone
- Â Hooker 1 episode, 2002
- Mike Shara
- Â Mission Control 1 episode, 2002
- Brittany Smith
- Â Ashley Lyndon 1 episode, 2002
- Matthew Finlason
- Â Male Grad Student 1 episode, 2002
- Patricia Yeatman
- Â Bernice Scrivens 1 episode, 2002
- Jimmy Gonzalez
- Â Detective Salzana 1 episode, 2002
- Robinne Fanfair
- Â Lab Worker (uncredited) 1 episode, 2002
- Jim Michaels
- Â Catcher (uncredited) 1 episode, 2002
- Justin Rodgers Hall
- Â Kylar (uncredited) 1 episode, 2002
- Michael Sercerchi
- Â Goth Person (uncredited) 1 episode, 2002
- Todd Bendera
- Â Dead Body (uncredited) 1 episode, 2002
- Dan Gosse
- Â Synthetic Guard (uncredited) 1 episode, 2002
- Tara Yelland
- Â Nurse (uncredited) 1 episode, 2003
- Scotty Cook
- (uncredited) 1 episode, 2003
- David Stinson
- Â Neighbour #4 (uncredited) 1 episode, 2003
- Brittney Banks
- Â Crack Synth (uncredited) 1 episode, 2003