 Brian McNamaraJonathan Hays - Command Specialist | Jonathan Hays - Command Specialist |
 Jason MichasJessie Bienstock - Computer Sciences | Jessie Bienstock - Computer Sciences |
 Duncan RegehrJacob Brown - Former Commander | Jacob Brown - Former Commander |
 Julia MontgomerySally Arthur, MD - Space Medicine | Sally Arthur, MD - Space Medicine |
 Tom BresnahanHuxley Welles - Navigation(as Tom Breznahan) | Huxley Welles - Navigation(as Tom Breznahan) |
 Margaret LangrickLuz Sansone - Communication | Luz Sansone - Communication |
 Sean O'ByrneVance Arthur | Vance Arthur |
 Peter DonatAdmiral Beasley | Admiral Beasley |
 Ric ReidCapt. Forbes | Capt. Forbes |
 Frank C. TurnerWilly | Willy |
 Dinah GastonLani Miyori - Communication | Lani Miyori - Communication |
 Bruce HarwoodLeland Eugene, MD - Psychiatrist | Leland Eugene, MD - Psychiatrist |
 Bill CroftTrager | Trager |
| JJohn 'Bear' CurtisWhistlestick | Whistlestick |
 Stephen DimopoulosThe Crier | The Crier |
| NNigel HarveySecurity Leader | Security Leader |
 Andrew KavadasBrody | Brody |
| BBarry KennedyLt. Matthews | Lt. Matthews |
 Kevin McNultyCmdr. Gardiner | Cmdr. Gardiner |
| JJennifer MichasJeannie | Jeannie |
 Stephen E. MillerLt. Krieger | Lt. Krieger |
 Enid SaundersElderly Woman | Elderly Woman |
| MMike StackCrewman #1 | Crewman #1 |
| SSandy TuckerMrs. Bienstock | Mrs. Bienstock |
| MMeredith Bain WoodwardMrs. Hays | Mrs. Hays |
 Henry KingiShell(uncredited) | Shell(uncredited) |
| LLynnette MetteyPriscilla(uncredited) | Priscilla(uncredited) |