Adolf Wohlbrück
— Stefan 'Steve' Radetzky
Sally Gray
— Carol Peters Radetzky
Derrick De Marney
— Mike Carroll
Cecil Parker
— Specialist
Percy Parsons
— Bill Peters
Kenneth Kent
— Andre De Guise
J.H. Roberts
— Residing Physician (as J.H.Roberts)
Guy Middleton
— Shorty
John Laurie
— British Commander
Frederick Valk
— Polish Bomber Commander
Robert Beatty
— Reporter with Carol
O.B. Clarence
— Waiter with Tray of Wine
James Pirrie
Marian Spencer
— Miss Gratton
Leslie Gordon
Philip Friend
— Pete
Michael Rennie
— Kapulski
Charles Farrell
— First Cab Driver
Elwyn Brook-Jones
— (uncredited)
Tommy Duggan
— (uncredited)
Gordon Glennon
— (uncredited)
Cynthia Heppner
— (uncredited)
Alan Keith
— (uncredited)
John Lawson
— (uncredited)
Kay Lewis
— (uncredited)
Conway Palmer
— (uncredited)
Kent Stevenson
— (uncredited)
William Taylor
— (uncredited)