Dr. Karl Roder
Clive Brook
Irena Roder
Diana Wynyard
Dressler
Clifford Evans
Capt. Muller
Bernard Miles
Dr. Weiner
Gibb McLaughlin
Hanna
Muriel George
Frau Lehmann the Concierge
Martita Hunt
Sebastian
Hay Petrie
S.S. Trooper
Manning Whiley
Granny Schmidt
Katie Johnson
Policeman
George Hayes
Maria Tattenheim
Everley Gregg
Rabenau
Raymond Huntley
Woman Customer
Marie Ault
Heini
Abraham Sofaer
Katie
Joan Hickson
S.S. Guard
Wyndham Milligan
Erna
Bunty Payne
Kurt
Pat McGrath
Radio Announcer (voice) (uncredited)
Ken Annakin
Chestnut Seller (uncredited)
Ernest Butcher
Radio Location Aerial Operator (uncredited)
William Hartnell
Fritz - Fenner's Dresser (uncredited)
Mike Johnson
Hans Glaser
Derek Farr
Nagel - Radio Location Expert (uncredited)
Ben Williams
(uncredited)
Victor Wood
Elly Schmidt
Joyce Howard
Kummer
Howard Marion-Crawford
Otto
John Penrose
Father Landbach
Morland Graham
Rudolf Spiedler
Ronald Squire
Emil Fenner
Reginald Beckwith
Writer
Anatole de Grunwald
Story
Roland Pertwee
Director of Photography
Bernard Knowles
Director
Anthony Asquith
Bridget Boland
Louis Golding
Gordon Wellesley
Jeffrey Dell
Basil Woon
Editor
Reginald Beck
Sound
Leslie Murray
Continuity
Peggy McClafferty