Anthony Bushell
— Det. Insp. Forsythe
Jane Baxter
— Linda Kent
Arthur Macrae
— Gilbert Kent
Ronald Squire
— Jim Kent
Margaret Rutherford
— Evelyn Summers aka Miss Butterby
Austin Trevor
— Swiss Hotelier-Gang Leader
Davina Whitehouse
— Goldie, the maid
Athole Stewart
— Mr. Kent
Katie Johnson
— Emily Kent
Felix Aylmer
— Police Commissioner
George Merritt
— Police constable
Wally Patch
— Thug
Victor Rietti
— Luggage Snatcher (uncredited)
Hal Gordon
— Det. Sergeant Helmsley