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Richard Attenborough
Dripper Daniels

James Donald
Lt. Richard Jennings, No. 1

Sonny Tufts
Yank Flanagan

Trevor Howard
Lt. Cmdr Hugh Alginon Fraser

Bernard Lee
A.S. 'Stripey' Wood

Dora Bryan
Glad Flanagan

Hugh Williams
Captain David G. Wilson

Robin Bailey
Lt. Michael Grant, Pilot

Meredith Edwards
Jones

John Forrest
Appleby the Captain's Steward

Patric Doonan
Petty Officer Martin

Sid James
Ned Hardy, Landlord Golden Bull
Harold Siddons
Adm. Bartlett

William Russell
Crewman

Joan Rice
June Mallory, WRNS cypher officer
Peter Bathurst
Commander C.E. Spencer

Charles Lloyd Pack
Captain R. G. Bates (Board of Inquiry)
Chris Adcock
Crewman (uncredited)

Tim Turner
Crewman (uncredited)
Art
Edward Carrick
Art Direction
Crew
Cliff Richardson
Special Effects
Editing
Alan Osbiston
Editor
Sound
Jack Slade
Sound Editor
Clifton Parker
Music
Red Law
Sound Recordist
Peter Handford
Sound Recordist
Writing
Ben Roberts
Story
William Fairchild
Screenplay
Ivan Goff
Story
Hugh Hastings
Screenplay

William Rose
Adaptation