Directed by
| Riccardo Freda | ... | (as Robert Hamton) |
| Mario Bava | ... | (post director) (uncredited) |
Writing Credits
| Filippo Sanjust | ... | (screenplay) (as Philip Just) |
| Riccardo Freda | ... | (screenplay) (uncredited) |
Cast (in credits order) complete, awaiting verification
| John Merivale | ... | Prof. John Fielding | |
| Didi Sullivan | ... | Ellen Fielding | |
| Gérard Herter | ... | Max Gunther (as Gerard Haerter) | |
| Giacomo Rossi Stuart | ... | Prof. Rodríguez's Assistant (as G.R. Stuart) | |
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Vittorio André | ... | Prof. Rodríguez (as Victor Andrèe) |
| Daniele Vargas | ... | Bob (as Daniel Vargas) | |
| Arturo Dominici | ... | Nieto (as Arthur Dominick) | |
| Nerio Bernardi | ... | Police Inspector (as Black Bernard) | |
| Daniela Rocca | ... | Linda | |
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Gail Pearl | ... | Indian Dancer (as Gay Pearl) |
| Rest of cast listed alphabetically: | |||
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Armando Annuale | ... | Journalist at Press Conference (uncredited) |
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Orlando Baralla | ... | Scientist (uncredited) |
| Mario Bava | ... | Mexican at Police Station (uncredited) | |
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Tom Felleghy | ... | Astronomer (uncredited) |
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Ferruccio Fregonese | ... | Journalist at Press Conference (uncredited) |
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Sandro Mondini | ... | Journalist at Press Conference (uncredited) |
| Renzo Palmer | ... | Narrator (uncredited) | |
| Renato Terra | ... | Investigating Officer (uncredited) | |
Produced by
| Lionello Santi | ... | executive producer (uncredited) |
| Samuel Schneider | ... | producer (as Sam Schneider) |
| Bruno Vailati | ... | producer |
Music by
| Roberto Nicolosi | ||
| Roman Vlad | ... | (uncredited) |
Cinematography by
| Mario Bava | ... | director of photography |
Editing by
| Salvatore Billitteri | ||
| Mario Serandrei | ||
Costume Design by
| Filippo Sanjust | ... | (as Phillip Just) |
Production Management
| Massimo De Rita | ... | production manager (as Max De Ryte) |
Second Unit Director or Assistant Director
| Odoardo Fiory | ... | assistant director (as Edoardo Fiory) |
Sound Department
| Maurice Rosenblum | ... | sound recordist: US dubbing |
| Carlo Rustichelli | ... | sound effects (uncredited) |
Special Effects by
| Mario Bava | ... | special effects (as Marie Foam) |
Camera and Electrical Department
| Antonio Rinaldi | ... | gaffer (uncredited) |
Editorial Department
| Salvatore Billitteri | ... | additional editor: US version |
Additional Crew
| Elle Bi | ... | scientific consultant |
| Ettore Catalucci | ... | laboratory director (as E. Catalucci) |
| Paolo Gozlino | ... | choreographer (as P. Gozlino) |
| Lee Kresel | ... | dubbing director: US version (as Lee Kressel) |
| Samuel Schneider | ... | presenter: US version (as Sam Schneider) |
| Renato De Carmine | ... | voice dubbing: John Merivale (uncredited) |
| Michele Malaspina | ... | voice dubbing: Vittorio André (uncredited) |
| Stefano Sibaldi | ... | voice dubbing: Gérard Herter (uncredited) |
| Rolf Tasna | ... | voice dubbing: Daniele Vargas (uncredited) |