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Boris Karloff as James Lee Wong |
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Marjorie Reynolds as Roberta 'Bobbie' Logan |
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Grant Withers as Capt. William Street |
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William Stelling as Dick Fleming |
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Catherine Craig as Cynthia Wentworth |
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Guy Usher as Paul Fleming |
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Henry Brandon as Attorney Victor Martin |
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Melvin Lang as Cyrus B. Wentworth |
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Wilbur Mack as Matthews |
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Kenneth Harlan as Ludlow |
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Richard Loo as Tong Leader |
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Tristram Coffin as Mr. Baldwin - Adjuster (uncredited) |
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Gibson Gowland as Doctor (uncredited) |
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Jack Kennedy as Police Sgt. Casey (uncredited) |
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Bill Willmering as Det. Blake (uncredited) |
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Mike Donovan as Det. Mike |
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Maxine Leslie as Miss Reed - Secretary |
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Moy Ming as Aged Tong Member |
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Angelo Rossitto as Newsboy #3 in Montage |
| Directing | William Nigh | Director |
| Production | Paul Malvern | Producer |
| Sound | Karl Zint | Sound Recordist |
| Costume & Make-Up | Gordon Bau | Makeup Artist |
| Sound | Edward J. Kay | Music |
| Camera | Harry Neumann | Director of Photography |
| Editing | Robert Golden | Editor |
| Writing | Michael Jacoby | Screenplay |
| Production | Charles J. Bigelow | Production Manager |
| Directing | Glenn Cook | Assistant Director |
| Writing | Hugh Wiley | Characters |
| Writing | Ralph Gilbert Bettison | Story |
