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Jeffrey Hunter as Signalman Andrew 'Canada' Brown |
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Michael Rennie as Lt. Richard Saville |
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Wendy Hiller as Lucinda Bentley |
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Bernard Lee as Petty Officer 'Stokes' Wheatley |
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Victor Maddern as Signalman Willy Earnshaw |
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John Horsley as Commander John Willis |
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Patrick Barr as Captain Tom Ashley, HMS Amesbury |
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Robin Bailey as Lieutenant John Stafford, HMS Stratford |
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James Drake as Navigator (uncredited) |
| Writing | Valentine Davies | Writer |
| Directing | Roy Boulting | Director |
| Sound | Ken Ritchie | Boom Operator |
| Camera | Reg Pope | Clapper Loader |
| Writing | C. S. Forester | Novel |
| Sound | Muir Mathieson | Music Director |
| Sound | Clifton Parker | Original Music Composer |
| Camera | Gilbert Taylor | Director of Photography |
| Art | Alex Vetchinsky | Art Direction |
| Editing | Alan Osbiston | Editor |
| Sound | Buster Ambler | Sound Recordist |
| Sound | Red Law | Sound Recordist |
| Production | Frank McCarthy | Producer |