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Barbara Cupisti as Erna |
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Pietro Genuardi as Paul |
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Lorenzo Majnoni as Manfred |
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Giacomo Rossi Stuart as Dr. Johns |
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Gaetano Russo as Maurizio |
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Andrea Damiano as Laura |
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Mario Luzzi as Theo |
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Paul Müller as The Monk |
| Writing | Olga Pehar | Screenplay |
| Production | Luigi Nannerini | Producer |
| Directing | Umberto Lenzi | Director |
| Production | Antonio Lucidi | Producer |
| Writing | Umberto Lenzi | Story |
| Writing | Umberto Lenzi | Writer |
| Camera | Sandro Mancori | Director of Photography |
| Sound | Piero Montanari | Original Music Composer |
| Editing | Vanio Amici | Editor |
| Art | Dario Micheli | Production Design |
| Crew | Giovanni Corridori | Special Effects |
| Crew | Antonio Corridori | Special Effects |
