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Бела Лугоши as Rolf |
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Лайонел Этуилл as Dr. King |
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Leif Erickson as Laurie |
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Irene Hervey as Dr. Lynne Harper |
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Ralph Morgan as Kurt Ingston |
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Дон Портер as Dick Baldwin |
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Nils Asther as Agor Singh |
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Фэй Хельм as Margaret Ingston |
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Frank Reicher as Dr. Timmons |
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Дорис Ллойд as Sarah Judd |
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Francis Pierlot as Dr. Phipps |
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Роберт Хоманс as Captain "Cap" Beggs |
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Janet Shaw as Millie Carson |
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Eddy Waller as Jeb Harmon |
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Cyril Delevanti as Torque |
| Production | Ford Beebe | Producer |
| Costume & Make-Up | Vera West | Costume Design |
| Art | Russell A. Gausman | Set Decoration |
| Art | Jack Otterson | Art Direction |
| Camera | Charles Van Enger | Director of Photography |
| Production | Donald H. Brown | Associate Producer |
| Sound | Hans J. Salter | Music Director |
| Writing | Clarence Upson Young | Writer |
| Directing | Ford Beebe | Director |
| Sound | Robert Pritchard | Sound |
| Sound | Bernard B. Brown | Sound Director |
| Editing | Milton Carruth | Editor |
