Directed by
| Jesús Franco | ... | (as Jess Franco) |
| Bruno Mattei | ... | (uncredited) |
Writing Credits
| Harry Alan Towers | ... | (screenplay) (as Peter Welbeck) |
| Jesús Franco | ... | (screenplay) (as Jess Franco) |
| Jesús Franco | ... | (story) (as Jess Franco) |
| Anya Corvin | ... | (German dialogue) |
| Milo G. Cuccia | ... | (screenplay) |
| Milo G. Cuccia | ... | (story) |
| Carlo Fadda | ... | (screenplay) |
| Carlo Fadda | ... | (story) |
| Manfred R. Köhler | ... | (dialogue) |
| Ornella Zanelli | ... | (Italian dialogue) |
| Javier Péres Grober | ... | (screenplay) |
Cast (in credits order) complete, awaiting verification
| Maria Schell | ... | Leonie Caroll | |
| Herbert Lom | ... | Governor Santos | |
| Mercedes McCambridge | ... | Thelma Diaz | |
| Luciana Paluzzi | ... | Natalie Mendoza | |
| Maria Rohm | ... | Marie (as Maria Rohn) | |
| Rosalba Neri | ... | Zoie | |
| Elisa Montés | ... | Helga (as Eliza Montes) | |
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Valentina Godoy | ... | Rosalie |
| Rest of cast listed alphabetically: | |||
| José María Blanco | ... | Doctor (uncredited) | |
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Mike Brendel | ... | Boatman (uncredited) |
| Jesús Franco | ... | Official (uncredited) | |
| Claudia Gravy | ... | Zoie's Boss (uncredited) | |
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Ana Lucarella | ... | Marta (uncredited) |
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Olívia Pineschi | ... | (uncredited) |
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Juan Antonio Riquelme | ... | Juan Diego (uncredited) |
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María Vico | ... | Guard (uncredited) |
| Elsa Zabala | ... | Official on Boat (uncredited) | |
Produced by
| Luis Laso | ... | producer (spanish version) (as Luis L. Moreno) |
| Harry Alan Towers | ... | producer |
Music by
| Bruno Nicolai | ||
Cinematography by
| Manuel Merino | ... | (photographed by) |
Editing by
| Bruno Mattei | ||
| Gabrielle Reinecke | ... | (German version) |
| Stanley Frazen | ... | (uncredited) |
Art Direction by
| Santiago Ontañón | ||
Makeup Department
| Manolita G. Fraile | ... | makeup artist (as Manuela G. Fraile) |
| Adolfo Ponte | ... | makeup artist |
Production Management
| Mario Damiani | ... | production manager: Italy |
| Franz Eichhorn | ... | production manager: Brazil |
| Robert S. Eisen | ... | post-production supervisor |
| Luis Laso | ... | general manager (as Luis Lazo) |
| Francisco Romero | ... | production manager |
Second Unit Director or Assistant Director
| Juan Estelrich | ... | assistant director |
Sound Department
| Elio Pacella | ... | sound engineer |
| James Nelson | ... | supervising sound editor (uncredited) |
Camera and Electrical Department
| Riccardo Damiani | ... | assistant camera |
| Felipe Lopez | ... | camera operator |
| Antonio Modica | ... | camera operator |
Editorial Department
| María Luisa Soriano | ... | editor: Spanish version |
Additional Crew
| Bruno Mattei | ... | director: hardcore sequences (French version) |
| Loredana Pagliaro | ... | production secretary |
| Félix Acaso | ... | voice dubbing (uncredited) |
| Salvador Arias | ... | voice dubbing: Herbert Lom (uncredited) |
| Lola Cervantes | ... | voice dubbing: Maria Schell (uncredited) |
| Matilde Conesa | ... | voice dubbing: Mercedes McCambridge (uncredited) |
| Delia Luna | ... | voice dubbing: Luciana Paluzzi (uncredited) |
| Josefina de Luna | ... | voice dubbing: Rosalba Neri (uncredited) |
| José Martínez Blanco | ... | voice dubbing: José María Blanco (uncredited) |
| María Luisa Rubio | ... | voice dubbing: Valentina Godoy (uncredited) |
| Mayte Santamarina | ... | voice dubbing: Maria Rohm (uncredited) |
