- Clive Brook
- Captain Armitage
- John Clements
- Lieutenant Cranford
- Edward Chapman
- Captain Eckersley
- Judy Campbell
- Lucy Armitage
- Penelope Dudley-Ward
- Mabel
- Edward Rigby
- Mr. Matthews
- Charles Williams
- 'Shorty' Howard
- Allan Jeayes
- Commander Blount
- Michael Wilding
- 'Dot'
- Harold Warrender
- Lt. Commander Martin
- David Hutcheson
- Captain Sandeman
- George Carney
- Bates
- Al Millen
- Knowles
- Charles Farrell
- Walker
- John Laurie
- Gates
- George Benson
- Parker
- Hay Petrie
- Minesweeper Skipper
- Mervyn Johns
- His Mate
- Albert Lieven
- Commander U.37
- John Wengraf
- Commander Deutschland
- Edward Lexy
- Merchantman Skipper
- John Glyn-Jones
- Mate
- John Boxer
- German Captain
- John Carol
- Edmonds
- Alec Clunes
- Lieutenant Commander
- Anton Diffring
- U-Boat Officer
- Derek Elphinstone
- Hawkins
- Alf Goddard
- Bosun's Mate
- Stewart Granger
- Sutton
- Bryan Herbert
- Signals Yeoman
- Patrick Holt
- Holt
- James Knight
- Admiral
- Howard Lang
- Gunnery Officer
- Maire O'Neill
- Mary Hogan
- Charles Rolfe
- Peacock - Wardroom Steward
- Johnnie Schofield
- Sailor
- Harry Terry
- Sailor
