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Victor McLaglen as Dannie O'Neill |
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Walter Connolly as Michael Steele |
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Peter Lorre as Professor Sturm |
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June Lang as Sheila O'Neill / Nancy Steele |
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Robert Kent as Jimmie Wilson |
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Shirley Deane as The false Nancy Steele |
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John Carradine as Harry Wilkins |
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Jane Darwell as Mrs. Mary Flaherty |
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Frank Conroy as Dan Mallon |
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Granville Bates as Flaherty |
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Everett Brown as Billy Tarabull |
| Directing | George Marshall | Director |
| Writing | Gene Fowler | Writer |
| Art | Hans Peters | Art Direction |
| Costume & Make-Up | Gwen Wakeling | Costume Design |
| Production | Nunnally Johnson | Associate Producer |
| Production | Darryl F. Zanuck | Producer |
| Writing | Charles Francis Coe | Story |
| Directing | Earl Haley | Assistant Director |
| Editing | Jack Murray | Editor |
| Art | Thomas Little | Set Decoration |
| Writing | Hal Long | Writer |
| Camera | Barney McGill | Director of Photography |