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Farley Granger as Spike |
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Lucia Bosè as Sylvia Forrest |
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Giacomo Rossi Stuart as Donald Forrest |
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Stelvio Rosi as Dr. Williams |
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Mia Genberg as Susan West |
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Gianni Medici as Joe |
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Angelo Francesco Lavagnino as Prof. Lawrence |
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Dino Fazio as Inspector Wright |
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Giulia Rovai as Joe's Girl |
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Franco Beltramme as Det. Sam |
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Loredana Nusciak as Model for Photo of Lady Sheila Marlowe |
| Directing | Mario Colucci | Director |
| Writing | Mario Colucci | Writer |
| Art | Massimo Bolongaro | Production Design |
| Art | Silvano Pan | Art Direction |
| Editing | Enzo Micarelli | Editor |
| Sound | Angelo Francesco Lavagnino | Original Music Composer |
| Camera | Giuseppe Aquari | Director of Photography |
| Production | Dino Fazio | Producer |
