 | Richard Kiel als Golob |
 | Corinne Cléry als Barbara Gibson |
 | Barbara Bach als Lady Agatha |
 | Leonard Mann als Nick |
 | Arthur Kennedy als Dr. Kraspin |
 | Ivan Rassimov als Lord Graal |
 | Massimo Serato als Great Brother |
 | Marco Yeh als Tom Tom |
 | Venantino Venantini |
| Vito Fornari |
 | José Quaglio |
 | Attilio Duse |
 | Ottaviano Dell'Acqua als Technician |
| Larry Dolgin als Narrator (voice) |
 | Hal Yamanouchi als Humanoid Soldier |
 | Milla Johansson als Girl who is drained of blood (uncredited) |
| Aldo Lado | Director |
| Adriano Bolzoni | Writer |
| Silvano Ippoliti | Director of Photography |
| Mario Morra | Editor |
| Mirella De Rossi | Hairstylist |
| Giorgio Venturini | Producer |
| Giacomo Caló Carducci | Art Direction |
| Ennio Morricone | Music |
| Giannetto De Rossi | Makeup Artist |
| Aldo Lado | Writer |
| Luca Sabatelli | Costume Design |
| Enzo Bulgarelli | Production Design |
| Germano Natali | Pyrotechnician |
| Cecilia Bigazzi | Production Supervisor |
| Viero Spadoni | Production Manager |
| Antonio Margheriti | Special Effects Supervisor |
| Adriano Bolzoni | Story |
| Armando Valcauda | Special Effects |
| Giuliano Principato | Production Manager |
| Enzo G. Castellari | Second Unit |
| Vittorio Biferale | Production Manager |
| Arduino Mercuri | Production Manager |
| Armando Valcauda | Animation Coordinator |
