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Errol Flynn as Sebastian Dubrok |
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Ida Lupino as Gemma Smith |
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Eleanor Parker as Fenella MacLean |
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Gig Young as Caryl Dubrok |
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Reginald Denny as Mr. MacLean |
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Isobel Elsom as Mrs. MacLean |
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Albert Bassermann as Professor Heinrich |
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Ludwig Stössel as Mr. Steinach |
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Milada Mladova as Natrova |
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Юрий Зорич as The Dancer |
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Helene Thimig as The Landlady |
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Frank Puglia as The Guide |
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Frank Reicher as The Minister |
| Writing | Thames Williamson | Screenplay |
| Writing | Margaret Kennedy | Novel |
| Production | Henry Blanke | Producer |
| Production | Jack L. Warner | Executive Producer |
| Sound | Erich Wolfgang Korngold | Original Music Composer |
| Editing | Clarence Kolster | Editor |
| Costume & Make-Up | Travilla | Costume Design |
| Directing | Peter Godfrey | Director |
| Camera | Sol Polito | Director of Photography |
| Art | Carl Jules Weyl | Art Direction |
| Sound | Dolph Thomas | Sound |
| Writing | Robert Stevens | Dialogue |
| Art | Fred M. MacLean | Set Decoration |
| Crew | Harry Barndollar | Special Effects |
| Crew | Willard Van Enger | Special Effects |
| Costume & Make-Up | Bernard Newman | Wardrobe Supervisor |
| Costume & Make-Up | Perc Westmore | Makeup Artist |
| Sound | Leo F. Forbstein | Music Director |
| Visual Effects | Paul Detlefsen | Matte Painter |