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Jack Hawkins as Insp. George Gideon |
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Anna Lee as Mrs. Kate Gideon |
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Anna Massey as Sally Gideon |
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Andrew Ray as PC Simon Farnaby-Green |
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Dianne Foster as Joanna Delafield |
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Cyril Cusack as Herbert 'Birdie' Sparrow |
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James Hayter as Robert Mason |
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Derek Bond as Det. Sgt. Eric Kirby |
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Howard Marion-Crawford as The Chief |
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John Loder as Ponsford 'The Duke' |
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Barry Keegan as Riley |
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Frank Lawton as Det. Sgt. Liggot |
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Michael Trubshawe as Sergeant Golightly |
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Grizelda Hervey as Mrs. Kirby |
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Henry B. Longhurst as Rev. Mr. Courtney |
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Jack Watling as Rev. Julian Small |
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Maureen Potter as Mrs. Ethel Sparrow |
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Donal Donnelly as Feeney |
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Dervis Ward as Simmo |
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Marjorie Rhodes as Mrs. Saparelli |
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Laurence Naismith as Arthur Sayer |
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Miles Malleson as The Judge |
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Ronald Howard as Paul Delafield |
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David Aylmer as Manners |
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Brian Smith as White-Douglas |
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James Hayter as Mason |
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Michael Shepley as Sir Rupert Bellamy |
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Joan Ingram as Lady Bellamy |
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John Le Mesurier as Barrister |
| Directing | John Ford | Director |
| Writing | John Creasey | Novel |
| Production | Bill Kirby | Production Supervisor |
| Production | Wingate Smith | Associate Producer |
| Sound | Douglas Gamley | Original Music Composer |
| Art | Ken Adam | Art Direction |
| Editing | Raymond Poulton | Editor |
| Writing | T. E. B. Clarke | Screenplay |
| Production | Michael Killanin | Producer |
| Camera | Freddie Young | Director of Photography |
| Costume & Make-Up | Charles Nash | Makeup Artist |
