| cast |
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| Series Regulars | |||
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| Alaina Huffman | Alaina Huffman as 1st Lt. Tamara Johansen | Brian J. Smith | Brian J. Smith as Lt. Matthew Scott |
| David Blue | David Blue as Eli Wallace | Elyse Levesque | Elyse Levesque as Chloe Armstrong |
| Jamil Walker Smith | Jamil Walker Smith as Sr. Sgt. Ronald Greer | Lou Diamond Phillips | Lou Diamond Phillips as Telford |
| Louis Ferreira | Louis Ferreira as Col. Everett Young | Ming-Na | Ming-Na as Camille Wray |
| Robert Carlyle | Robert Carlyle as Dr. Nicholas Rush | | |
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| Recurring & Guests | |||
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| Julie McNiven | Julie McNiven as Ginn | Michael Shanks | Michael Shanks as Dr. Daniel Jackson |
| Patrick Gilmore | Patrick Gilmore as Dr. Dale Volker | Robert Knepper | Robert Knepper as Simeon |