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Richard Carlson as Steve Smith ("Whispering Smith") |
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Greta Gynt as Louise Balfort |
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Herbert Lom as Roger Ford |
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Rona Anderson as Anne Carter |
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Alan Wheatley as Hector Reith |
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Dora Bryan as Miss La Fosse |
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Reginald Beckwith as Manson |
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Daniel Wherry as Dr. Taren |
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Michael Ward as Hotel Desk Clerk |
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Danny Green as Cecil |
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James Raglan as Insp. Dave Meeker |
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Stuart Nichol as Martin |
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Laurence Naismith as Parker |
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Christine Silver as Mrs. Pearson |
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Vic Wise as Maxie |
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Middleton Woods as Station Porter |
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Ben Williams as Taxi Driver |
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Sidney Vivian as Hotel Porter |
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Toni Frost as Secretary |
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June Nardsley as Maid |
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Michael Hogarth as Police Constable |
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John Wynn as Police Sergeant |
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Anthony Warner as Page Boy |
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Ian Wilson as Small Tough |
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Stanley Baker as 1st Reporter |
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Lionel Grose as 2nd Reporter |
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John Singer as 1st Photographer |
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John Kyle as 2nd Photographer |
| Directing | Francis Searle | Director |
| Writing | John Gilling | Story |
| Writing | Frank H. Spearman | Characters |
| Editing | James Needs | Editor |
| Production | Arthur Barnes | Production Manager |
| Directing | Renée Glynne | Continuity |
| Sound | Jack Miller | Sound Recordist |
| Costume & Make-Up | Philip Leakey | Makeup Artist |
| Costume & Make-Up | Anne Box | Hairstylist |
| Directing | Jimmy Sangster | Assistant Director |
| Production | Michael Carreras | Casting |
| Camera | Walter J. Harvey | Director of Photography |
| Camera | Peter Bryan | Camera Operator |
| Sound | Frank Spencer | Music |
| Production | Anthony Hinds | Producer |
| Writing | John Gilling | Writer |
