• 
  Jason Isaacs

  Mark Brydon
• 
  Lennie James

  Luke Gardner (4 episodes, 2006)
• 
  Ben Daniels

  Nicholas Brocklehurst
• 
  Aaron Abrams

  Matthew Weiss
• 
  Brian Bisson

  Warners Secretary (1 episode, 2006)
• 
  Briony Glassco

  Jennifer (5 episodes, 2006)
• 
  Neil Pearson

  Phil Lonsdale (6 episodes, 2006)
• 
  David Eisner

  Sam Levinson (4 episodes, 2006)

• 
  David Huband

  Warden Slake (3 episodes, 2006)
• 
  Bill Lake

  Head Joint Chiefs (1 episode, 2006)
• 
  Patrick Garrow

  Brad Godovsky (3 episodes, 2006)
• 
  Todd Sandomirsky

  Terry Bennett  (3 episodes, 2006)
• 
  Maria Ricossa

  Madeleine Cohen (1 episode, 2006)
• 
  Simon Northwood

  Chemical Suit Man (1 episode, 2006)
• 
  Matt Birman

  Mercenary 1 (1 episode, 2006)

• 
  Arlene Duncan

  Female FBI agent (2 episodes, 2006)
• 
  Kevin Hanchard

  Boston FBI Agent (1 episode, 2006)
• 
  Barry Flatman

  Governor Karpinski (2 episodes, 2006)
• 
  Marnie McPhail

  George Blake (6 episodes, 2006)
• 
  Paulino Nunes

  Eshan Borisvitch (2 episodes, 2006)
• 
  Sharon Gless

  Lynne Warner (6 episodes, 2006)
• 
  Genevieve O'Reilly

  Caroline Hanley (6 episodes, 2006)
• 
  Kevin Rushton

  Swain's Henchman 2 (1 episode, 2006)
• 
  Joe Pingue

  Al Rivero (3 episodes, 2006)
• 
  Emma Campbell

  Sally Davis (5 episodes, 2006)
• 
  Noam Jenkins

  Christopher Styles (6 episodes, 2006)
• 
  Nigel Bennett

  Charles Macintyre (6 episodes, 2006)
• 
  Michael Rhoades

  Gary Pritchard (4 episodes, 2006)
• 
  Maxine Dumont

  Beltway Injured Woman (1 episode, 2006)
• 
  Roman Podhora

  Vernon (4 episodes, 2006)
• 
  Derek Scott

  Billy the Tramp (1 episode, 2006)
• 
  J.C. Kenny

  Jeb Starkey (2 episodes, 2006)
• 
  Desmond Campbell

  FBI Agent (1 episode, 2006)
• 
  Ron Lea

  Carl Garcia (4 episodes, 2006)
• 
  Christopher Bolton

  Vinny Swain (6 episodes, 2006)
• 
  Kevin Louis

  Airport Security  (2 episodes, 2006)
• 
  Eva Birthistle

  Jane Lavery (6 episodes, 2006)
• 
  Paul Mota

  General Glenn (unknown episodes)
• 
  Alex Jennings

  James Sinclair (6 episodes, 2006)
• 
  Ted Whittall

  Gordon Adair (6 episodes, 2006)
• 
  Anita Carey

   Mrs. Gardner (3 episodes, 2006)
• 
  Wayne Downer

   Tim (3 episodes, 2006)
• 
  Glen Grant

  Boston Customs Officer
• 
  Peter James Haworth

   General Lane (3 episodes, 2006)
• 
  Vijay Mehta

  Hassan Khan
• 
  Rory O'Shea

   Anchor 2 / ... (3 episodes, 2006)
• 
  Peter Snider

  Macintyre's Lawyer
• 
  Jonathan Whittaker

  Anthony Hanley
• 
  Rahnuma Panthaky

   Nasreen Qureshi (5 episodes, 2006)
• 
  Daniela Lama

   Saida Sinclair (2 episodes, 2006)
• 
  Louca Tassone

  Azzam Sinclair
• 
  Cory Atkins

   Glen Laroche (2 episodes, 2006)
• 
  Nigel Bennett

  Charles Macintyre