H.M.S. Defiant

Alec Guinness

Captain Crawford

Dirk Bogarde

Lieut. Scott-Padget

Anthony Quayle

Vizard

Maurice Denham

Mr. Goss (Ship's Surgeon)

Nigel Stock

Senior Midshipman Kilpatrick

Tom Bell

Evans

Richard Carpenter

Lieut. Posonby

Ray Brooks

Hayes

Robin Stewart

Pardoe

Murray Melvin

Wagstaffe

Victor Maddern

Dawlish

David Robinson

Harvey Crawford

Bryan Pringle

Sgt Kneebone

Johnny Briggs

Wheatley

Toke Townley

Silly Billy

Declan Mulholland

Morrison

Peter Greenspan

Johnson

Brian Phelan

Grimshaw