- Novel By:
- T. C. H. Jacobs.
- Produced By:
- Ayton Whitaker.
- Unknown:
- Freda Falconer.
- Unknown:
- Rita Vale
- Unknown:
- Victor Fairley
- Narrator:
- Wallace Geoffrey
- Superintendent Bellamy:
- Hugh Latimer
- Inspector Pollard:
- Richard Williams
- Detective Inspector Fremington:
- Keith Shepherd
- Detective Sergeant Blott:
- Leslie Dwyer
- Squad Sergeant:
- Leslie Twelvetrees
- Driver:
- Ernest Sefton
- Bill:
- Frank Partington
- Control:
- Graham Doody
- Captain Stenner:
- Tommy Duggan
- Doc Dryburgh:
- Abraham Sofaer
- Bruno:
- Frank Atkinson
- Marie:
- Phyllis Clare
- Snowy Sowden:
- Charles Farrell
