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John Mills as Lt. Cmdr. Armstrong |
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Richard Attenborough as Stoker Snipe |
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Nigel Patrick as Lt. Manson |
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George Cole as ERA Marks |
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Bernard Lee as Cmdr. Gates |
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Peter Hammond as Sub-Lt. Oakley |
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Andrew Crawford as Sub-Lt. J. McFee |
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Michael Brennan as CPO Barlow |
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Wylie Watson as |
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Helen Cherry as |
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Lana Morris as |
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Victor Maddern as |
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Kenneth More as |
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Zena Marshall as |
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James Hayter as |
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Frank Coburn as Leading Seaman Brough |
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Roddy McMillan as Leading Seaman Andrews |
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Jack Stewart as Leading Seaman Kelly |
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George Thorpe as Capt. Fenton |
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Alastair Hunter as Capt. Jenner |
| Directing | Roy Ward Baker | Director |
| Writing | W.E. Fairchild | Writer |
| Writing | Kenneth Woollard | Theatre Play |
| Production | Jay Lewis | Producer |
| Camera | Desmond Dickinson | Director of Photography |
| Editing | Alan Osbiston | Editor |
| Production | Tina L. Scott | Casting |
| Art | Alex Vetchinsky | Art Direction |
| Camera | Harold Haysom | Camera Operator |
| Camera | H.E. Fowle | Additional Photography |
| Costume & Make-Up | Tony Sforzini | Makeup Artist |
| Sound | George Croll | Sound |
| Sound | John W. Mitchell | Sound |
| Sound | Jack Slade | Sound |
| Production | Herbert Smith | Production Manager |
