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Barbara Steele as Cynthia Hichcock |
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Robert Flemyng as Prof. Bernard Hichcock |
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Silvano Tranquilli as Dr. Kurt Lowe |
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Maria Teresa Vianello as Margherita Hichcock |
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Harriet Medin as Martha, the maid |
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Spencer Williams as |
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Al Christianson as |
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Evaristo Signorini as Inspector Scott |
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Giovanni Querrel as |
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Neil Robinson as |
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Howard Nelson Rubien as |
| Directing | Riccardo Freda | Director |
| Writing | Ernesto Gastaldi | Writer |
| Costume & Make-Up | Italia Scandariato | Costume Design |
| Costume & Make-Up | Euclide Santoli | Makeup Artist |
| Production | Luigi Carpentieri | Producer |
| Costume & Make-Up | Annette Winter | Hairstylist |
| Production | Lou D. Kelly | Production Manager |
| Sound | Jackson McGregor | Sound |
| Editing | Ornella Micheli | Editor |
| Production | Charles Law | Production Supervisor |
| Camera | Raffaele Masciocchi | Director of Photography |
| Production | Ermanno Donati | Producer |
| Art | Franco Fumagalli | Production Design |
| Art | Joseph Goodman | Art Direction |
| Directing | John M. Farquhar | Assistant Director |
| Writing | Ernesto Gastaldi | Story |
| Sound | Roman Vlad | Original Music Composer |
