- Novel By:
- Nevil Shute
- Unknown:
- Stephen Grenfell
- Unknown:
- Anna Massey
- Unknown:
- Trader Faulkner
- Produced By:
- Betty Davies
- Mrs Duncan:
- Brenda Dunrich
- Colonel Duncan:
- Russell Napier
- Annie:
- Molly Rankin
- Alan Duncan:
- Trader Faulkner
- Bill Duncan:
- John Baddelly
- Lt -Commander Cartwright:
- Norman Claridge
- Admiral Savage:
- Kenneth Hyde
- First Sea Lord:
- Peter Pratt
- P O Waters:
- Michael Goldie
- Janet Prentice:
- Anna Massey
- Viola Dawson:
- Diana Olsson
- Sub-Lieutenant Craigie:
- Alan Haines
- Captain Gibson:
- Frederick Treves
- Flight-Lieutenant Rigby:
- Garard Green
- Albert Finch:
- Andrew Sachs
- Lieutenant Parkes:
- Gabriel Woolf
- Catherine Collins:
- Margaret Wolfit
- Alice:
- Petronella Barker
- Clerk:
- Nicolette Bernard
