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Henry Daniell as Dr. Emil Zurich |
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Valerie French as Alison Drake |
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Grant Richards as Lt. Jeff Rowan |
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Paul Wexler as Zutai |
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Eduard Franz as Jonathan Drake |
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Frank Gerstle as Det. Lee Coulter |
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Lumsden Hare as Rogers, the butler |
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Howard Wendell as Dr. George Bradford |
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Paul Cavanagh as Kenneth Drake |
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Jonathan Hole as Funeral Director (uncredited) |
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Arthur Tovey as Minister at Funeral (uncredited) |
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Bert Stevens as Mourner at Funeral (uncredited) |
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Hans Moebus as Mourner (uncredited) |
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Anthony Redondo as Attendant (uncredited) |
| Directing | Herbert S. Greene | Assistant Director |
| Crew | Rudy Stangler | Special Effects |
| Costume & Make-Up | Charles Gemora | Makeup Artist |
| Costume & Make-Up | Lillian Shore | Hairdresser |
| Art | Max Frankel | Property Master |
| Sound | Henry Adams | Sound Effects Editor |
| Directing | Betty Fancher | Script Supervisor |
| Costume & Make-Up | Einar Bourman | Wardrobe Master |
| Costume & Make-Up | Sabine Manela | Wardrobe Master |
| Sound | Ben Winkler | Sound |
| Directing | Edward L. Cahn | Director |
| Production | Robert E. Kent | Producer |
| Sound | Paul Dunlap | Original Music Composer |
| Writing | Orville H. Hampton | Writer |
| Camera | Maury Gertsman | Director of Photography |
| Art | William Glasgow | Art Direction |
| Art | Morris Hoffman | Set Decoration |
| Editing | Edward Mann | Editor |
