 Vincent PriceDr. Goldfoot / General Willis | Dr. Goldfoot / General Willis |
 FabianBill Dexter | Bill Dexter |
 Franco FranchiFranco | Franco |
 Ciccio IngrassiaCiccio | Ciccio |
 Francesco MulèColonel Doug Benson | Colonel Doug Benson |
 Laura AntonelliRosanna | Rosanna |
 Frankie AvalonCraig Gamble (uncredited) (archive footage) | Craig Gamble (uncredited) (archive footage) |
 Susan HartDiane (uncredited) (archive footage) | Diane (uncredited) (archive footage) |
 Dwayne HickmanTodd Armstrong (uncredited) (archive footage) | Todd Armstrong (uncredited) (archive footage) |
 Aron KincaidMotorist Who Hits Diane (uncredited) (archive footage) | Motorist Who Hits Diane (uncredited) (archive footage) |
 Moa TahiHardjob - Dr. Goldfoot's Assistant (uncredited) | Hardjob - Dr. Goldfoot's Assistant (uncredited) |
 George WangFong (uncredited) | Fong (uncredited) |
 Ennio AntonelliGoldfoot Henchman (uncredited) | Goldfoot Henchman (uncredited) |
 Amerigo SantarelliGoldfoot Henchman (uncredited) | Goldfoot Henchman (uncredited) |
 Veriano GinesiBald Goldfoot Henchman (uncredited) | Bald Goldfoot Henchman (uncredited) |
 Silvana BacciRobot (uncredited) | Robot (uncredited) |
| AAntonietta FioritoRobot (uncredited) | Robot (uncredited) |
 Gianfranco FunariUS Army Official (uncredited) | US Army Official (uncredited) |
| LLouis M. HeywardAmerican General (uncredited) | American General (uncredited) |
 Mario BavaAngel with Harp (uncredited) | Angel with Harp (uncredited) |
