Norman Wisdom

Ordinary Seaman Norman Puckle

Ian Hunter

Admiral Sir Bryanston Blyth

David Lodge

Chief Petty Officer Knowles

Robert Urquhart

Commander Clayton

Edward Chapman

Mr. Philpots

Eddie Byrne

Petty Officer Filkins

Peter Jones

Diving Instructor

John Le Mesurier

Prosecuting Counsel

Terence Alexander

Defending Counsel

Sydney Tafler

Speedboat Owner

Brian Oulton

Bert Ainsworth

Harold Goodwin

Streaky Hopkinson

Johnny Briggs

Johnny Nolan

Frank Williams

Mr. Carruthers

Joe Robinson

Tall Sailor

Liz Fraser

NAAFI Girl

Penny Morrell

Miss Marlene Barlow

Claire Gordon

Blonde on Yacht

John Arnatt

Briggs (uncredited)

Michael Caine

Sailor in Cinema Fight (uncredited)

Cyril Chamberlain

Jimmy (uncredited)

Roland Curram

Control Room Radio Operator (uncredited)

Larry Dann

New Dalton's Boy (uncredited)

Robert Desmond

Sailor on Bridge of Warship (uncredited)

Sheila Hancock

Doris (uncredited)

Imogen Hassall

Girl in Cinema Queue (uncredited)

Glyn Houston

Gym Instructor (uncredited)

Roy Lansford

Prisoner Escort (uncredited)

Philip Locke

Teddy Boy in Cinema Fight (uncredited)

Bryan Pringle

Physical Training Instructor (uncredited)

Oliver Reed

Teddy Boy in Cinema Fight (uncredited)

William Roache

Space Centre Operator (uncredited)

Leonard Sachs

Yachtsman (uncredited)