Directed by
| Walter Forde | ||
Writing Credits (in alphabetical order)
| Sidney Gilliat | ... | (additional dialogue) |
| Angus MacPhail | ||
| Robert Stevenson | ||
| Edgar Wallace | ... | (novel) |
Cast (in credits order)
| Patric Curwen | ... | Dr. Lomond | |
| Esmond Knight | ... | John Lenley | |
| John Longden | ... | Inspector Wembury | |
| Carol Goodner | ... | Cora Ann Milton | |
| Gordon Harker | ... | Samuel Hackett | |
| Franklin Dyall | ... | Maurice Meister | |
 |
Dorothy Bartlam | ... | Mary Lenley |
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Henry Hallatt | ... | Inspector Bliss |
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Arthur Stratton | ... | Sgt. Carter |
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Kathleen Joyce | ... | Gwenda Milton |
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Eric Stanley | ... | Commissioner |
| Rest of cast listed alphabetically: | |||
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Clifford Buckton | ... | Minor Role (uncredited) |
| Alexander Knox | ... | Bit Role (uncredited) (unconfirmed) | |
Produced by
| Michael Balcon | ... | producer |
| Edgar Wallace | ... | executive producer |
Cinematography by
| Alex Bryce | ... | (photography) |
| Leslie Rowson | ... | director of photography |
Editing by
| Ian Dalrymple | ||
Production Management
| Bryan Edgar Wallace | ... | production manager |
Second Unit Director or Assistant Director
| Herbert Smith | ... | assistant director (uncredited) |
Art Department
| Norman G. Arnold | ... | designer |
Sound Department
| Harold V. King | ... | sound |
Script and Continuity Department
| Rosaire Rutland | ... | continuity |
