| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Alaina Huffman | Lt. Tamara Johansen | Beretta 92FS | - |
| Brian J. Smith | Lt. Matthew Scott | Heckler & Koch G36K | - |
| Brian J. Smith | Lt. Matthew Scott | Walther P38 | - |
| Brian J. Smith | Lt. Matthew Scott | Beretta 92FS | - |
| Lou Diamond Phillips | Colonel David Telford | M1911A1 | - |
| Louis Ferreira | Colonel Everett Young | Heckler & Koch UMP | Season 3 |
| Rhona Mitra | Commander Kiva | Vektor CP1 | - |
| Robert Carlyle | Nicholas Rush | M4A1 Carbine | Episode 1x08 "Time" |
| Robert Carlyle | Nicholas Rush | Beretta 92FS | Episode 2x08 "Malice" |
| Robert Knepper | Simeon | Norinco QBZ-97 | - |