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Soledad Miranda as Mrs. Johnson |
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Fred Williams as Dr. Johnson |
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Paul Müller as Dr. Franklin Houston |
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Ewa Strömberg as Dr. Crawford |
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Howard Vernon as Prof. Jonathan Walker |
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Jesús Franco as Dr. Donen |
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Horst Tappert as Inspector |
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Beni Cardoso as Mrs. Donen |
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Germán Robles as Policeman |
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Rudolf Hertzog as Member of Medical Congress |
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Karl Heinz Mannchen as Member of Medical Congress |
| Directing | Jesús Franco | Director |
| Production | Artur Brauner | Producer |
| Camera | Manuel Merino | Director of Photography |
| Production | Karl Heinz Mannchen | Executive Producer |
| Writing | Jesús Franco | Writer |
| Production | Arturo Marcos | Producer |
| Sound | Manfred Hübler | Original Music Composer |
| Editing | Clarissa Ambach | Editor |
| Sound | Bruno Nicolai | Original Music Composer |
| Sound | Sigi Schwab | Original Music Composer |
