 | David James Elliott
Alex Kittner (3 episodes, 2009) |
 | Natasha Henstridge
Dr. Maddie Rhodes (3 episodes, 2009) |
| Benjamin Sadler
Roland Emerson (2 episodes, 2009) |
 | Florentine Lahme
Martina Altmann (2 episodes, 2009) |
 | James Cromwell
Lloyd |
 | Steven Culp
President Edward Taylor |
 | Yee Jee Tso
Jered O'Banno (2 episodes, 2008-2009) |
 | Colin Cunningham
David Rhodes (2 episodes, 2009) |
 | Michael Kopsa
General Vaughn (2 episodes, 2008-2009) |
 | Samantha Ferris
Renee Ferguson (2 episodes, 2008-2009) |
 | Ron Lea
Tom Ranfield (2 episodes, 2008-2009) |
 | Gerard Plunkett
Terrence Young (2 episodes, 2008-2009) |
 | Ty Olsson
Derek (2 episodes, 2008-2009) |
 | Dean Redman
War Room Tech #1 (2 episodes, 2009) |