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Jean Simmons as Sophie Malraux |
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Trevor Howard as Maj. David Somers |
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Sonia Dresdel as Jess Fenton |
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Barry Jones as Nicholas Fenton |
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Kenneth More as Willy Shepley |
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Geoffrey Keen as Police Inspector |
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André Morell as Secret Service Chief Chubb (as Andre Morell) |
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Michael Brennan as Police Superintendent |
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Gerard Heinz as Dr. Karl Cesare |
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Lily Kann as Minna Cesare |
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Eric Pohlmann as Taxidermist |
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Richard Wattis as Employment Agent |
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Sandra Dorne as Kyra |
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Maire O'Neill as Nora |
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Maxwell Reed as Hick |
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Marianne Stone as Young Woman at Nora's House (uncredited) |
| Editing | Gordon Hales | Editor |
| Camera | Geoffrey Unsworth | Director of Photography |
| Directing | Ralph Thomas | Director |
| Sound | Benjamin Frankel | Original Music Composer |
| Production | Betty E. Box | Producer |
| Writing | Janet Green | Original Story |
| Writing | Janet Green | Screenplay |
