| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alan Rawsthorne | Crew | Sound | Music |
Anthony Mendleson | Crew | Costume & Make-Up | Wardrobe Designer |
Barbara Barnard | Crew | Costume & Make-Up | Hairstylist |
 Charles Frend | Crew | Directing | Director |
Chic Waterson | Crew | Camera | Camera Operator |
 Eric Ambler | Crew | Writing | Screenplay |
Ernest Irving | Crew | Sound | Conductor |
Gordon Dines | Crew | Camera | Director of Photography |
Hal Mason | Crew | Production | Production Supervisor |
Jim Morahan | Crew | Art | Art Direction |
Jo Jago | Crew | Crew | Second Unit Cinematographer |
L.C. Rudkin | Crew | Production | Unit Production Manager |
Leslie Norman | Crew | Production | Producer |
Norman Priggen | Crew | Directing | Assistant Director |
Paul Beeson | Crew | Crew | Second Unit Cinematographer |
Peter Tanner | Crew | Editing | Editor |
Sidney Turner | Crew | Costume & Make-Up | Makeup Artist |
Sydney Pearson | Crew | Crew | Special Effects |
Stephen Dalby | Crew | Sound | Sound Supervisor |
Nicholas Monsarrat | Crew | Writing | Novel |
Leo Wilkins | Crew | Sound | Sound Recordist |
Jean Graham | Crew | Directing | Continuity |
Geoffrey Dickinson | Crew | Visual Effects | Visual Effects |
J. E. Broome | Crew | Crew | Technical Advisor |
John R.F. Stewart | Crew | Camera | Additional Photography |
R. S. Abram | Crew | Crew | Technical Advisor |
 Alan Webb | Cast | Actor | Admiral Murray-Forbes (uncredited) |
 Alec McCowen | Cast | Actor | Tonbridge |
 Andrew Cruickshank | Cast | Actor | Scott Brown |
 Barry Letts | Cast | Actor | Raikes |
 Bruce Seton | Cast | Actor | Tallow |
Dafydd Havard | Cast | Actor | Signalman Rose |
 Denholm Elliott | Cast | Actor | Morell |
 Don Sharp | Cast | Actor | Lieutenant-Commander |
 Donald Sinden | Cast | Actor | Lockhart |
Fred Griffiths | Cast | Actor | Gracey |
 George Curzon | Cast | Actor | Admiral at Party |
 Gerard Heinz | Cast | Actor | Polish Captain |
Gerik Schjelderup | Cast | Norwegian Captain | |
 Glyn Houston | Cast | Actor | Phillips |
 Harold Goodwin | Cast | Actor | ASDIC Operator |
Herbert C. Walton | Cast | The Waiter | |
 Jack Hawkins | Cast | Actor | Ericson |
 Jim Brady | Cast | Actor | Sailor in Water |
 John Singer | Cast | Actor | Gray |
 John Stratton | Cast | Actor | Ferraby |
 John Warner | Cast | Actor | Baker |
 June Thorburn | Cast | Actress | Doris Ferraby |
 Laurence Hardy | Cast | Actor | Sellars |
Leo Phillips | Cast | Actor | Wainwright |
 Liam Redmond | Cast | Actor | Watts |
 Megs Jenkins | Cast | Actress | Tallow's Sister |
 Meredith Edwards | Cast | Actor | Yeoman Wells |
 Moira Lister | Cast | Actress | Elaine Morell |
 Paddy Joyce | Cast | Actor | Sonar Operator (uncredited) |
 Richard Leech | Cast | Actor | Sailor (uncredited) |
Ronald Simpson | Cast | Actor | R.N. Captain |
 Russell Waters | Cast | Actor | A.R.P. Warden |
 Sam Kydd | Cast | Actor | Carslake |
 Stanley Baker | Cast | Actor | Bennett |
 Virginia McKenna | Cast | Actress | Julie Hallam |
 Walter Fitzgerald | Cast | Actor | Warden (uncredited) |
Warwick Ashton | Cast | Actor | Petty Officer Instructor |
Harold Jamieson | Cast | A.R.P. Warden | |
Barry Steele | Cast | Broughton | |
Gaston Richer | Cast | French Captain | |
Kenn Kennedy | Cast | Allingham | |
Anthony Snell | Cast | R.N. Lieutenant | |
Jack Howard | Cast | A Survivor | |
| Person | Type | Job | Role(s) |
