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Phyllis Calvert as Evelyn Acheson |
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Eric Portman as Henry Acheson |
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Stanley Baker as Stephen Lorimer |
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Mandy Miller as Elizabeth Lorimer |
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Dora Bryan as Cassie |
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Percy Herbert as Det. Sgt. Taylor |
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Joan Benham as Vera McNally |
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Victor Maddern as Bert |
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Martin Miller as Professor Topolski |
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Joan Hickson as Cook |
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Alfie Bass as Ticket Collector |
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Bruce Beeby as Policeman |
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Grace Arnold as Mrs. Groves |
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Molly Urquhart as Mrs. Parsons |
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Estelle E. Richmond as Nurse |
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Peter Burton as Howard Forbes (uncredited) |
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Maggie Smith as Party Guest (uncredited) |
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Christopher Toyne as Peter McNally (uncredited) |
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Carol White as Elizabeth's Friend (uncredited) |
| Writing | Cy Endfield | Screenplay |
| Writing | Janet McNeil | Novel |
| Directing | Cy Endfield | Director |
| Production | George Fowler | Associate Producer |
| Camera | Otto Heller | Director of Photography |
| Editing | Charles Hasse | Editor |
| Sound | Mario Nascimbene | Original Music Composer |
| Production | Maude Spector | Casting |
| Art | Ken Adam | Art Direction |
| Production | Benjamin Fisz | Producer |
| Directing | Douglas Hermes | Assistant Director |
| Production | 'Freddie' Pearson | Production Manager |
| Sound | Charles Tasto | Sound Mixer |
| Sound | Franco Ferrara | Conductor |
| Costume & Make-Up | Trevor Crole-Rees | Makeup Artist |
| Camera | Chic Waterson | Camera Operator |
| Costume & Make-Up | Bobbie Smith | Hairdresser |
