Directed by
| Jesús Franco | ... | (as Jess Frank) |
Writing Credits (in alphabetical order)
| Artur Brauner | ... | (as Art Bernd) |
| Jesús Franco | ... | (as Jess Frank) |
| Bryan Edgar Wallace | ... | (novel) |
Cast (in credits order)
| Horst Tappert | ... | Charles Barton | |
 |
Fred Williams | ... | Inspector Ruppert Redford |
| Barbara Rütting | ... | Celia | |
| Elisa Montés | ... | Helen Bennett | |
| Luis Morris | ... | Andy Pickwick | |
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Siegfried Schürenberg | ... | Dr. Bladmore |
| Mara Laso | ... | Lizi | |
|
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Eva Garden | ... | Linda |
|
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Rainer Basedow | ... | McDowell |
|
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Ángel Menéndez | ... | Scotland Yard Chef (as Ángel Meléndez) |
| Wolfgang Kieling | ... | Ferencz | |
| Dan van Husen | ... | Kronstel | |
|
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Guillermo Méndez | ... | Wood |
| Jesús Franco | ... | Gonzales | |
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Andrea Montchal | ... | Patakes (as Viktor Feldman) |
| Rest of cast listed alphabetically: | |||
| Beni Cardoso | ... | Diana | |
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Karl Heinz Mannchen | ... | Guest in Restaurant (uncredited) |
| Emilio Martínez Lázaro | ... | (uncredited) | |
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Moisés Augusto Rocha | ... | Roger (uncredited) |
Produced by
| Artur Brauner | ... | producer |
| Karl Heinz Mannchen | ... | executive producer |
| Arturo Marcos | ... | producer |
Music by
| Rolf Kühn | ||
Cinematography by
| Manuel Merino | ||
Editing by
| Renate Engelmann | ||
| María Luisa Soriano | ||
Production Design by
| Hans Jürgen Kiebach | ||
Set Decoration by
| Klaus Meyenberg | ... | (as K. Meyerberg) |
Production Management
| Rolf Meier | ... | production manager |
Second Unit Director or Assistant Director
| Ruth Keller | ... | assistant director |
Sound Department
| Max Galinsky | ... | sound |
Music Department
| Jesús Franco | ... | composer: incidental music (as Pablo Villa) |
Additional Crew
| Hans Clarin | ... | voice dubbing: Luis Morris (uncredited) |
| Thomas Danneberg | ... | voice dubbing: Fred Williams (uncredited) |
| Arne Elsholtz | ... | voice dubbing (uncredited) |
| Beate Hasenau | ... | voice dubbing: Mara Laso (german version) (uncredited) |
| Ursula Herwig | ... | voice dubbing: Elisa Montés (uncredited) |
| Holger Kepich | ... | voice dubbing: Wolfgang Kieling (uncredited) |
| Gerd Martienzen | ... | voice dubbing: Jesús Franco (uncredited) |
| Heinz Petruo | ... | voice dubbing: Ángel Menéndez (uncredited) |
| Christian Rode | ... | voice dubbing: Dan van Husen (uncredited) |
| Jürgen Thormann | ... | voice dubbing: Andrés Monales (uncredited) |
| Elmar Wepper | ... | voice dubbing: Rainer Basedow (uncredited) |
