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Anthony Steffen as Doctor Williams |
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Anita Strindberg as Grace Wright |
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Gabriele Tinti as Fred Wright |
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Umberto Raho as Philip |
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Stelio Candelli as Garner |
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Kathryn Witt as Robin |
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Alfio Nicolosi as Peacock |
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Gordon Felio as |
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Richard Osborne as |
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Bob Lemoine as |
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Pierre Richard Merceron as |
| Crew | Marcello Masciocchi | Cinematography |
| Production | Marcello Tranchini | Production Manager |
| Production | Marcello Masciocchi | Production Manager |
| Production | Andrea Di Sangiuliano | Producer |
| Production | Pino de Martino | Producer |
| Writing | Anthony Steffen | Writer |
| Camera | Antonio Schiavo Lena | Camera Operator |
| Directing | Edoardo Mulargia | Director |
| Editing | Cesare Bianchini | Editor |
| Directing | Giampaolo Lomi | Director |
| Sound | Piero Umiliani | Music |
