Full Credits
43 members

Jack Hawkins
Ericson

Donald Sinden
Lockhart

Denholm Elliott
Morell

John Stratton
Ferraby

Stanley Baker
Bennett

Liam Redmond
Watts

Meredith Edwards
Yeoman Wells

Bruce Seton
Tallow

John Warner
Baker

Barry Letts
Raikes

Gerard Heinz
Polish Captain

Fred Griffiths
Gracey

Glyn Houston
Phillips

Virginia McKenna
Julie Hallam

Megs Jenkins
Tallow's Sister

June Thorburn
Doris Ferraby

Moira Lister
Elaine Morell

Alec McCowen
Tonbridge
Leo Phillips
Wainwright
Dafydd Havard
Signalman Rose

Laurence Hardy
Sellars

Sam Kydd
Carslake

John Singer
Gray
Barry Steele
Broughton
Gerik Schjelderup
Norwegian Captain
Gaston Richer
French Captain

Andrew Cruickshank
Scott Brown
Kenn Kennedy
Allingham

Harold Goodwin
ASDIC Operator

George Curzon
Admiral at Party
Anthony Snell
R.N. Lieutenant
Ronald Simpson
R.N. Captain

Don Sharp
Lieutenant-Commander
Herbert C. Walton
The Waiter
Jack Howard
A Survivor

Russell Waters
A.R.P. Warden
Harold Jamieson
A.R.P. Warden
Warwick Ashton
Petty Officer Instructor

Walter Fitzgerald
Warden (uncredited)

Paddy Joyce
Sonar Operator (uncredited)

Richard Leech
Sailor (uncredited)

Jim Brady
Sailor in Water

Alan Webb
Admiral Murray-Forbes (uncredited)
26 members
Charles Frend
Director
Norman Priggen
Assistant Director
Jean Graham
Continuity
Nicholas Monsarrat
Novel
Eric Ambler
Screenplay
Leslie Norman
Producer
Hal Mason
Production Supervisor
L. C. Rudkin
Unit Production Manager
Gordon Dines
Director of Photography
Chic Waterson
Camera Operator
John R.F. Stewart
Additional Photography
Alan Rawsthorne
Music
Stephen Dalby
Sound Supervisor
Leo Wilkins
Sound Recordist
Ernest Irving
Conductor
Jim Morahan
Art Direction
Sidney Turner
Makeup Artist
Barbara Barnard
Hairstylist
Anthony Mendleson
Wardrobe Designer
Geoffrey Dickinson
Visual Effects
Peter Tanner
Editor
Sydney Pearson
Special Effects
J. E. Broome
Technical Advisor
R. S. Abram
Technical Advisor
Jo Jago
Second Unit Cinematographer
Paul Beeson
Second Unit Cinematographer