| Person | Type | Job | Role(s) |
|---|---|---|---|
 Abe Meyer | Crew | Sound | Music Director |
Charles J. Bigelow | Crew | Production | Production Manager |
E.R. Hickson | Crew | Crew | Technical Supervisor |
Edward J. Kay | Crew | Sound | Original Music Composer |
Gordon Bau | Crew | Costume & Make-Up | Makeup Artist |
Harry Neumann | Crew | Camera | Director of Photography |
Houston Branch | Crew | Writing | Screenplay |
Hugh Wiley | Crew | Writing | Characters, Original Story |
Karl Zint | Crew | Sound | Recording Supervision |
Russell F. Schoengarth | Crew | Editing | Editor |
Scott R. Dunlap | Crew | Production | Producer, Production Manager |
W.B. Eason | Crew | Directing | Assistant Director |
 William Nigh | Crew | Directing | Director |
William T. Lackey | Crew | Production | Producer |
Harry Grundstrum | Crew | Art | Props |
 Boris Karloff | Cast | Actor | James Lee Wong |
 Clancy Cooper | Cast | Actor | Warehouse Man (uncredited) |
Dick Reinhart | Cast | Dock Worker (uncredited) | |
 Ed Cassidy | Cast | Actor | Ambulance Doctor (uncredited) |
 Evelyn Brent | Cast | Actress | Olga Petroff / Countess Dubois / Sophie Dome |
Frank Bruno | Cast | Actor | Lescardi (uncredited) |
 George DeNormand | Cast | Actor | John (uncredited) |
 George Lloyd | Cast | Actor | Devlin |
Grace Wood | Cast | Mrs. Roemer | |
 Grant Withers | Cast | Actor | Police Capt. Sam Street |
 Herbert Evans | Cast | Actor | Wilk's Butler (uncredited) |
 Hooper Atchley | Cast | Actor | Christian Wilk |
 John Hamilton | Cast | Actor | Simon Dayton |
 John St. Polis | Cast | Actor | Carl Roemer |
 Lee Tung Foo | Cast | Actor | Tchin |
 Lester Dorr | Cast | Actor | Coroner (uncredited) |
 Lucien Prival | Cast | Actor | Anton Mohl |
 Lynton Brent | Cast | Actor | Tommy |
 Maxine Jennings | Cast | Actress | Myra Ross |
 Wheaton Chambers | Cast | Actor | Chemistry Lab Director (uncredited) |
 Wilbur Mack | Cast | Actor | Russell |
 William Gould | Cast | Actor | Theodore Meisle |
| Person | Type | Job | Role(s) |
