Anna Neagle
— Sally Maitland
Richard Greene
— Lieutenant Commander Jim Garrick
Nova Pilbeam
— Betty Maitland
Albert Lieven
— Jan Orlock
Lucie Mannheim
— Madame Orlock
George Thorpe
— Colonel Charles Hargraves
Marjorie Fielding
— Lady Maitland
Franklin Dyall
— Captain Foster
Margaret Rutherford
— Mrs. Towcester
Claude Bailey
— Major Fothergill
Valentine Dyall
— German Commander
Sybille Binder
— Madame Orlock's Attendant
Cyril Fletcher
— And Introducing Entertainer
Leslie Dwyer
— Ship's Steward
Ian Fleming
— Observe Corpsman in Opening Scene
David Horne
— Admiral
Eliot Makeham
— Observer Corpsman in Opening Scene
Aubrey Mallalieu
— Reynolds
Paul Dupuis
— Intelligence Officer