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Terry-Thomas as Capt. J. (Jeroboam) Barker-Rynde PI |
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Eric Sykes as Rumbelow |
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Lionel Jeffries as Det. Insp. Hook |
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Dennis Price as Dr. Julian Crossley |
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Moira Redmond as Frances Roitman |
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David Lodge as Richards |
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Ronnie Barker as Burton |
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Hazel Terry as Mrs. Rachel Crossley |
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Derren Nesbitt as Roger Forrester |
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Anna Russell as Mrs. Margaret Clifford |
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Julian Orchard as PC Lofthouse |
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Katya Douglas as Rita |
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Harry Locke as Higgins |
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Peter Butterworth as Barman |
| Directing | George Pollock | Director |
| Directing | Ray Freeborn | Third Assistant Director |
| Writing | David Pursall | Screenplay |
| Writing | Jack Seddon | Screenplay |
| Writing | David Pursall | Story |
| Writing | Jack Seddon | Story |
| Sound | Ron Goodwin | Music |
| Camera | Geoffrey Faithfull | Director of Photography |
| Editing | Bert Rule | Editor |
