Joel McCrea
— Lt. Col. Robert Taine
Evelyn Keyes
— Cecily
Herbert Lom
— Sandorski
Roland Culver
— Randall
Marius Goring
— Hiart
Frank Lawton
— Hassingham
Patricia Laffan
— Magda
Cyril Raymond
— Cartwright
Karl Stepanek
— Diss
David Hurst
— Lex
Denis Lehrer
— Reimann
Laurence Naismith
— Blossom
Megs Jenkins
— Mrs. Powell
Robert Dickens
— Tommy
Jack McNaughton
— Inspector Matthews
Arnold Bell
— Sgt. Baines
Ellis Irving
— Wharton
Clement McCallin
— Inspector Sullivan
Joan Hickson
— Station Announcer
Powys Thomas
— Ambulance Driver
Charles Hammond
— Railway Ticket Clerk (uncredited)
George Hilsdon
— Police Constable (uncredited)
Ian Selby
— Lex's Contact (uncredited)