Ericson

Jack Hawkins

Acting

Lockhart

Donald Sinden

Acting

Morell

Denholm Elliott

Acting

Ferraby

John Stratton

Acting

Bennett

Stanley Baker

Acting

Watts

Liam Redmond

Acting

Yeoman Wells

Meredith Edwards

Acting

Tallow

Bruce Seton

Acting

Baker

John Warner

Acting

Raikes

Barry Letts

Production

Polish Captain

Gerard Heinz

Acting

Gracey

Fred Griffiths

Acting

Phillips

Glyn Houston

Acting

Julie Hallam

Virginia McKenna

Acting

Tallow's Sister

Megs Jenkins

Acting

Doris Ferraby

June Thorburn

Acting

Elaine Morell

Moira Lister

Acting

Tonbridge

Alec McCowen

Acting

Wainwright

Leo Phillips

Acting

Signalman Rose

Dafydd Havard

Acting

Sellars

Laurence Hardy

Acting

Carslake

Sam Kydd

Acting

Gray

John Singer

Acting

Broughton

Barry Steele

Acting

Norwegian Captain

Gerik Schjelderup

Acting

French Captain

Gaston Richer

Acting

Scott Brown

Andrew Cruickshank

Acting

Allingham

Kenn Kennedy

Acting

ASDIC Operator

Harold Goodwin

Acting

Admiral at Party

George Curzon

Acting

R.N. Lieutenant

Anthony Snell

Acting

R.N. Captain

Ronald Simpson

Acting

Lieutenant-Commander

Don Sharp

Directing

The Waiter

Herbert C. Walton

Acting

A Survivor

Jack Howard

Acting

A.R.P. Warden

Russell Waters

Acting

A.R.P. Warden

Harold Jamieson

Acting

Petty Officer Instructor

Warwick Ashton

Acting

Warden (uncredited)

Walter Fitzgerald

Acting

Sonar Operator (uncredited)

Paddy Joyce

Acting

Sailor (uncredited)

Richard Leech

Acting

Sailor in Water

Jim Brady

Acting

Admiral Murray-Forbes (uncredited)

Alan Webb

Acting