- Alberta Watson - Madeline
- Alberta Watson - Madeline A.I.
- Ric Reid - Stan
- Nigel Bennett - Col. Egran Petrosian
- Mackenzie Gray - Skyler
- William Colgate - Shadowy Man
- Marnie McPhail - Julia Roarke
- Jennifer Finnigan - Dory
- Dawn Greenhalgh - Mrs. Collins
- Julian Richings - Errol Sparks
- Kevin Connolly - Injured Operative
- Stefan Brogren - Security Guard
- Polly Shannon - Michelle
- Ryan Scott Greene - Peter
- Ksenia Solo - Irina
- Barry Morse - Wolfgang Volker
- Maxwell Caulfield - Helmut Volker
- Stephen McHattie - Willie Kane
- James Purcell - Carlos Bonaventure
- Anthony J. Mifsud - Terrorist #1
- Michael Cera - Jerome
- Carlo Rota - Mick Stoppel
- Carlo Rota - Mr. Jones
- Aaron Ashmore - Neil Hudson
- Clé Bennett - Trent Hammett
- Kira Clavell - Jasmine Kwong
- Megan Fahlenbock - Claire Brooks
- Brian Poth - Patrick 'Darwin' Donoghue
- Lawrence Bayne - Davenport
- David Stinson - Crystal Sky Op #5 (uncredited)
- Siân Phillips - Adrian
- Kris Lemche - Greg Hillinger
- Joseph Scoren - Tiko / Interrogator
- Joseph Scoren - Corliss
- David Hemblen - George
- Callum Keith Rennie - Gray Wellman
- Cindy Dolenc - Kate Quinn
- Simon MacCorkindale - Alec Chandler
- Michael Filipowich - Kosten
- Gerry Mendicino - George Hardin
- Ingrid Veninger - Siobhan
- Mung-Ling Tsui - Simone
- Marc Cohen - Hester
- Lindsay Collins - Devo #1 (uncredited)
- Lindsay Collins - Elizabeth
- David Calderisi - Jovan Mijovich
- Billy Otis - Harry
- Ravinder Toor - Prisoner
- Bill MacDonald - Giddion Van Vactor
- Jasper Cole - Detective
- Tony Curtis Blondell - Construction Worker
- Anais Granofsky - Carla
- Janet Lo - Chan Park
- Steve Mousseau - Coleman Reilly
- Bruce Payne - Jurgen
- Nicu Branzea - Kudrin
- Derwin Jordan - Marco
- Chuck Shamata - Stephan Vacek
- Samia Shoaib - Elena
- Christopher Heyerdahl - Colin Starnes
- Salvatore Antonio - Hugo (uncredited)
- Ted Atherton - Ray Leeds
- Anthony Lemke - Guard
- Tony Nappo - Marco Dean
- Dean McDermott - Sykes
- Peter Outerbridge - Roger
- Andrew Gillies - Jean-Marc Rousseau
- Colombe Demers - Mia
- Anthony Christian Potenza - Rueben
- Adam Ant - Simon Crachek
- Guylaine St-Onge - Caroline
- Trent McMullen - Mark
- Karen Glave - Angela
- Vince Corazza - Prisoner
- Josh Holliday - Devo #2 (uncredited)
- Jay Firestone
- Sean Callery
Julian Richings interpreta a Errol Sparks en la serie.
Callum Keith Rennie interpreta a Gray Wellman en la serie.
Stephen McHattie hace el papel de Willie Kane.
Bill MacDonald interpreta a Giddion Van Vactor en la serie.
Peta Wilson hace el papel de Nikita.
Roy Dupuis interpreta a Michael en la serie.
Matthew Ferguson interpreta a Seymour Birkoff en la serie.
Eugene Robert Glazer hace el papel de Operations.
Don Francks hace el papel de Walter.
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