Three astronauts crash land on an Earth-like planet after returning from a 7-year long expedition to Ganymede. The planet however is populated by murderous psychopaths who kill two of the astronauts right away. The third, Roger Corman, flees to the alien countryside where he decides to begin a violent quest to find out the truth behind his mission.
| Actor | Role |
|---|---|
| GGeorge N. ThompsonCorporal Roger Corman | Corporal Roger Corman |
 Brian KlapsteinCaptain Murdoch | Captain Murdoch |
| JJeanette BakerBarbara Peters | Barbara Peters |
 Mark IsaacsonJohn Stryker | John Stryker |
 Gordon MitchellGeneral Murchison | General Murchison |
 Tim JahnAttacker | Attacker |
| DDominic FantazziCommander Lyle Davidson | Commander Lyle Davidson |
 Brandon BacaThe Hunter | The Hunter |
| KKelsa ShilanskiDebbie Hill | Debbie Hill |
 Wayne HorineOrderly | Orderly |
| CChris GeerOrderly | Orderly |
| TTy KeltnerJohnny Guitar | Johnny Guitar |
| SSally RafsonVictim | Victim |
| TTyler WilliamsSoldier with Gas Mask | Soldier with Gas Mask |
 Charles C. PierceAttacker | Attacker |
| MMicheal LovecraftTV Reporter | TV Reporter |
| MMatt RogersInsane Person | Insane Person |
| AAdam KelleyDoctor | Doctor |
| JJennifer JonesNurse | Nurse |
| AAren CallahanSoldier | Soldier |
| GGreg S. CampbellSoldier | Soldier |