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Boris Karloff as Mr. James Lee Wong |
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Marjorie Reynolds as Roberta 'Bobbie' Logan |
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Grant Withers as Police Capt. Bill Street |
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Huntley Gordon as Mr. Davidson |
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George Lynn as Capt. Guy Jackson |
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William Royle as Capt. Jaime |
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James Flavin as Police Sgt. Jerry |
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Lotus Long as Princess Lin Hwa |
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Lee Tung Foo as Willie |
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Bessie Loo as Lilly May |
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Ernie Stanton as Bailey |
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I. Stanford Jolley as Palisser Hotel Clerk |
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Jack Kennedy as Sgt. Brady |
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Donald Kerr as Taxi Driver |
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Wilbur Mack as The Coroner |
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Moy Ming as Aged Tong Member |
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Bruce Mitchell as Police Officer at Explosion |
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Angelo Rossitto as Mute Dwarf |
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Guy Usher as Police Commissioner |
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Richard Loo as Tong Chief |
| Directing | William Nigh | Director |
| Production | William T. Lackey | Producer |
| Writing | Hugh Wiley | Characters |
| Writing | Scott Darling | Screenplay |
| Production | Charles J. Bigelow | Production Manager |
| Sound | Edward J. Kay | Music |
| Directing | W.B. Eason | Assistant Director |
| Camera | Harry Neumann | Director of Photography |
| Editing | Russell F. Schoengarth | Editor |
