- Rupert Evans - Williams
- Elizabeth Seal - Gwen
- Jack Stewart - Gregson
- Frank Thornton - Inspector Finch
- Trevor Reid - Commissioner
- Edwin Richfield - Nat
- Jane Harwood - Cashier
- Madge Brindley - Mrs. Evans
- Joan Carol - Scientific Officer
- Tom Bowman - Detective Sergeant (uncredited)
- Jim Brady - Policeman at Bank (uncredited)
- Chick Fowles - Detective at Briefing (uncredited)
- Nora Gordon - Fred's Landlady (uncredited)
- Vernon Greeves - Radio Detector Operator (uncredited)
- Pat Hagan - Police Constable at Warehouse (uncredited)
- Patrick Halpin - Detective at Briefing (uncredited)
- Hubert Hill - Plotter in Taxi Control Room (uncredited)
- Aileen Lewis - Barmaid (uncredited)
- George Margo - American Serviceman in the Taxi (uncredited)
- Arthur Mullard - Detective at Briefing (uncredited)
- Fred Nicholas - Detective at Briefing (uncredited)
- Joe Phelps - Police Constable (uncredited)
- Cleo Rose - Girl in the Taxi (uncredited)
- Pat Ryan - Cop at Bank (uncredited)
- Leonard Sharp - Charlie - First Bank Nightwatchman (uncredited)
- Madoline Thomas - Apex Charlady (uncredited)
- Joe Wadham - Travel Agency Manager (uncredited)
- Ian Wilson - Second Bank Nightwatchman (uncredited)
- Vernon Sewell
- Doris Martin
- Vernon Sewell
-
George Maynard
Capítulo disponible en las siguientes plataformas:
