| Robert Carlyle | Dr. Nicholas Rush |
| Louis Ferreira | Colonel Everett Young |
| Brian J. Smith | Lt. Matthew Scott |
| Elyse Levesque | Chloe Armstrong |
| David Blue | Eli Wallace |
| Alaina Huffman | Lt. Tamara Johansen |
| Jamil Walker Smith | Master Sgt. Ronald Greer |
| Ming-Na Wen | Camille Wray |
| Kathleen Munroe | Amanda Perry |
| Julia Benson | 2nd Lt. Vanessa James |
| Peter Kelamis | Adam Brody |
| Patrick Gilmore | Dr. Dale Volker |
| Jennifer Spence | Dr. Lisa Park |
| Mark Burgess | Dr. Jeremy Franklin |
| Reiko Aylesworth | Sharon Walker |
| Catherine Lough Haggquist | Mary |
| Haig Sutherland | Sgt. Hunter Riley |
| Jeffrey Bowyer-Chapman | Pvt. Darren Becker |
| Michael Karl Richards | Major Peterson |
| Vera Menoza-Cuadra | Airman |