Det. Insp. Forsythe
Anthony Bushell
Linda Kent
Jane Baxter
Police constable
George Merritt
Thug
Wally Patch
Luggage Snatcher (uncredited)
Victor Rietti
Det. Sergeant Helmsley
Hal Gordon
Gilbert Kent
Arthur Macrae
Jim Kent
Ronald Squire
Evelyn Summers aka Miss Butterby
Margaret Rutherford
Swiss Hotelier-Gang Leader
Austin Trevor
Goldie, the maid
Davina Whitehouse
Mr. Kent
Athole Stewart
Emily Kent
Katie Johnson
Police Commissioner
Felix Aylmer
Additional Dialogue
Director
Bernard Vorhaus
Adaptation
L. du Garde Peach
Michael Hankinson
Art Direction
Andrew Mazzei
Additional Photography
Kurt Neubert
Assistant Director
James Davidson
Director of Photography
Curt Courant
Otto Martini
Editor
Ralph Kemplen
Sound Recordist
Baynham Honri
Paul Hervey Fox
Music Director
W.L. Trytel
Producer
Julius Hagen
Leo Wilkins
Theatre Play
Neil Grant