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Clive Brook as Dr. Karl Roder |
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Diana Wynyard as Irena Roder |
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Raymond Huntley as Rabenau |
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Derek Farr as Hans Glaser |
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Joyce Howard as Elly Schmidt |
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Howard Marion-Crawford as Kummer |
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John Penrose as Otto |
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Morland Graham as Father Landbach |
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Ronald Squire as Rudolf Spiedler |
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Reginald Beckwith as Emil Fenner |
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Clifford Evans as Dressler |
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Bernard Miles as Capt. Muller |
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Gibb McLaughlin as Dr. Weiner |
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Muriel George as Hanna |
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Martita Hunt as Frau Lehmann the Concierge |
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Hay Petrie as Sebastian |
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Manning Whiley as S.S. Trooper |
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Katie Johnson as Granny Schmidt |
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George Hayes as Policeman |
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Everley Gregg as Maria Tattenheim |
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Marie Ault as Woman Customer |
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Abraham Sofaer as Heini |
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Joan Hickson as Katie |
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Wyndham Milligan as S.S. Guard |
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Bunty Payne as Erna |
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Pat McGrath as Kurt |
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Ken Annakin as Radio Announcer (voice) (uncredited) |
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Ernest Butcher as Chestnut Seller (uncredited) |
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William Hartnell as Radio Location Aerial Operator (uncredited) |
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Mike Johnson as Fritz - Fenner's Dresser (uncredited) |
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Ben Williams as Nagel - Radio Location Expert (uncredited) |
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Victor Wood as (uncredited) |
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Howard Lang as Radio Operator (uncredited) |
| Writing | Anatole de Grunwald | Writer |
| Writing | Bridget Boland | Story |
| Writing | Gordon Wellesley | Story |
| Writing | Basil Woon | Writer |
| Writing | Roland Pertwee | Story |
| Writing | Louis Golding | Story |
| Directing | Anthony Asquith | Director |
| Camera | Bernard Knowles | Director of Photography |
| Editing | Reginald Beck | Editor |
| Sound | Leslie Murray | Sound |
| Directing | Peggy McClafferty | Continuity |
| Writing | Jeffrey Dell | Screenplay |
| Writing | Jeffrey Dell | Dialogue |
