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
Bernard Vorhaus
Director
Paul Hervey Fox
Additional Dialogue
Otto Martini
Additional Photography
W.L. Trytel
Music Director
Michael Hankinson
Adaptation
Arthur Macrae
Additional Dialogue
Julius Hagen
Producer
Kurt Neubert
Additional Photography
James Davidson
Assistant Director
L. du Garde Peach
Adaptation
Ralph Kemplen
Editor
Curt Courant
Director of Photography
Baynham Honri
Sound Recordist
Leo Wilkins
Sound Recordist
Andrew Mazzei
Art Direction
Neil Grant
Theatre Play