Mai Zetterling
— Lidia
Robert Beatty
— Campbell Reid
Guy Rolfe
— Major Lawrence
Herbert Lom
— Fritz Kottler Hendlemann
Patrick Holt
— Ferguson
Arnold Marlé
— Professor Franz Menzel
Sybille Binder
— Eitel Hendlemann
Thora Hird
— Mrs. Skinner
Gerard Heinz
— Heine
Yvonne Owen
— Helen
George Thorpe
— Brigadier
Philo Hauser
— Hans Ackermann
John Blythe
— Johnnie
Cyril Chamberlain
— Supervisor
Betty Lynne
— Interpreter
Nelly Arno
— Anna Skutetsky
Richard Molinas
— Man in Crowd with Anna
Donald Sinden
— Minor Role
Hugo Schuster
— Interpreter
Eric Messiter
— Coroner
Dorothea Glade
— Hildegard Schmidt
Michael Hordern
— Johnson
Pete Murray
— Lieutenant Keith
Gordon Bell
— Captain Roberts
Sam Kydd
— Army Truck Driver
Eric Pohlmann
— Search Group Leader
Anthony Steel
— Bridegroom
Arthur Hambling
— Coroner's Officer (uncredited)
Paul Hansard
— Fritz (uncredited)
Dennis Harkin
— Richard (uncredited)