- Mark Thomas - Lawrence Slingsby
- Nigel Bennett - Ian Greene
- K.C. Collins - Jale
- Peter MacNeill - Michael Merchant
- Stephen McHattie - Tate
- Pierre Alcide - French President Pascal
- Raoul Bhaneja - Charlie
- Nicu Branzea - Sergi
- Victoria Fodor - Summit Organizer
- Kristina Nicoll - German Chancellor Fredericka
- Krista Bridges - Dr. Zuzanna Vrobova
- Tim Campbell - Computer Geek
- Christopher Cordell - Gate Commissioner
- Tony Craig - Sergeant
- Neil Crone - General Stevens
- Noah Dalton Danby - Jarhead
- Onyekachi Ejim - President Seko
- Alfredo Espinosa - Foreman
- Mac Fyfe - Fred
- Patrick Garrow - US Kentucky Private
- Bruce Gooch - Ohio Police Chief
- Matt Gordon - Demchuk
- Lori Hallier - Ditchburn
- Ingrid Hart - Black Ops Tech
- Noah Huntley - Danny
- J.C. Kenny - Journalist #2
- Cyrus Lane - White House Staffer
- Linlyn Lue - Irene Babiak
- Michael A. Miranda - Italian Prime Minister
- James Purcell - Inspector Brimlow
- Joel Rinzler - Journalist #4
- Kris Saric - Cop #1
- Philip Shepherd - Dr. Klaus
- Adam Sinclair - Wilcox
- Mark Sparks - Armoury Clerk
- Peter Spence - Phil
- Rob Stewart - Colonel Chadsworth
- Beatrice Stucki - Journalist #3
- Peter Tharos - Journalist
- Randy Triggs - Police Jail Guard
- Sugith Varughese - Motel Manager
- Johnny Williams - Kentucky State Trooper
- Scott Garvie
- Justin Bodle
- Christina Jennings
- Robin Neinstein
- Robert Cohen
Noah Huntley interpreta a Danny en la serie.
Peter MacNeill interpreta a Michael Merchant en la serie.
Stephen McHattie interpreta a Tate en la serie.
Lisa Ray interpreta a Rebecca Downy en la serie.
James Purefoy interpreta a Thom Lightstone en la serie.
Rachelle Lefevre hace el papel de Leonie Adderly.
Bruce Greenwood interpreta a Richard Adderly en la serie.
Wendy Crewson interpreta a Ellie Bruckner en la serie.
Christopher Plummer interpreta a P.J. Aimes en la serie.
Mía Maestro interpreta a Maria Puerto en la serie.
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