- Unknown:
- C. S. Forester
- Broadcasting By:
- Malcolm Baker-Smith
- Produced By:
- R. D. Smith
- Paymaster Sub-Lieutenant Jerning-ham:
- Ian Lubbock
- The Captain ('Methy '):
- Malcolm Graeme
- Paymaster-Commander:
- Noel Dryden
- Surgeon-Lieutenant:
- Malcolm Baker-Smith
- Daphne:
- Jane Jordan Rogers
- Dora Darby:
- June Tobin
- Ordinary Seaman Quimsby:
- Leigh Crutchley
- Chief Yeoman of Signals:
- Philip Cunningham
- Pilot (Navigating Lieutenant):
- Duncan McIntyre
- Able Seaman Dawkins:
- Joe Sterne
- Telegraph Rating:
- John Boddington
- Leading Seaman Harris:
- Peter Claughton
- Able Seaman Presteign (Curly):
- Haydn Jones
- Ordinary Seaman Whipple:
- Kenneth McClellan
- Gunnery Lieutenant:
- Hugh Manning
- Midshipman:
- Anthony Viccars
- Admiral Beatty:
- Geoffrey Wincott
- Commander:
- Frederick Treves
- Kapitan-sur-See von Bodicke:
- Peter Claughton
- Vice-Ammiraglio Nocentini:
- John Ruddock
