- Writer:
- Keith Latham
- Film editor:
- Ron de Mattos
- Designer:
- Frederick Knapman
- Producer:
- Gerald Wiltshire
- Lt-Cdr W.J. Kingsford, D.S.C., R.N.:
- Alan White
- Lieut Roger Lewis, R.N.V.R.:
- Douglas Blackwell
- Sub-Lieut Colin Weston, R.N.:
- Peter Marden
- Chief Petty Officer 'Tubby' Willis:
- Alfred Hoffman
- Petty Officer Hastings:
- Nigel Clayton
- Leading Seaman Hill:
- Michael Kayne
- Leading Cook 'Noddy' Green:
- Edward Burnham
- Able Seaman Clarkson:
- Leslie Bates
- Able Seaman Smallwood:
- Patrick Scanlan
- Able Seaman 'Cliff' Thomas:
- Henry Davies
- Ordinary Seaman Robins:
- Christopher Gilmore
- Neil Forest:
- Kenneth Gouge
- Susan Forest:
- Michele Dotrice
- Antonio Thomar:
- Paul Bogdan
