Directed by
| William Nigh | ||
Writing Credits
| Michael Jacoby | ... | (screenplay) (as Michel Jacoby) |
| Ralph Gilbert Bettison | ... | (story) (as Ralph Bettinson) |
| Hugh Wiley | ... | (characters from James Lee Wong stories in Collier's Magazine) |
Cast (in credits order) complete, awaiting verification
| Boris Karloff | ... | James Lee Wong | |
| Marjorie Reynolds | ... | Roberta 'Bobbie' Logan | |
| Grant Withers | ... | Police Capt. William Street | |
| William Stelling | ... | Dick Fleming | |
| Catherine Craig | ... | Cynthia Wentworth | |
| Guy Usher | ... | Paul Fleming | |
| Henry Brandon | ... | Victor Martin | |
| Melvin Lang | ... | Cyrus B. Wentworth | |
| Wilbur Mack | ... | Matthews | |
| Kenneth Harlan | ... | Ludlow | |
| Richard Loo | ... | Tong Leader | |
| Rest of cast listed alphabetically: | |||
| Tristram Coffin | ... | Mr. Baldwin - Adjuster (uncredited) | |
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Mike Donovan | ... | Detective Mike (uncredited) |
| Gibson Gowland | ... | Doctor (uncredited) | |
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Jack Kennedy | ... | Police Sgt. Casey (uncredited) |
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Maxine Leslie | ... | Miss Reed - Secretary (uncredited) |
| Moy Ming | ... | Aged Tong Member (uncredited) | |
| Angelo Rossitto | ... | Newsboy in Montage (uncredited) | |
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Bill Willmering | ... | Detective Blake (uncredited) |
Produced by
| Paul Malvern | ... | associate producer |
Cinematography by
| Harry Neumann | ... | director of photography |
Editing by
| Robert Golden | ||
Makeup Department
| Gordon Bau | ... | makeup artist (uncredited) |
Production Management
| Charles J. Bigelow | ... | production manager |
| Scott R. Dunlap | ... | executive in charge of production |
Second Unit Director or Assistant Director
| Glenn Cook | ... | assistant director (as Glen Cook) |
Sound Department
| Karl Zint | ... | sound recording engineer |
Music Department
| Edward J. Kay | ... | musical director (as Edward Kay) / composer: stock music (uncredited) |
Additional Crew
| E.R. Hickson | ... | technical director |