John Mills as Lt. Taylor RN

Eric Portman as L/S Hobson

Louis Bradfield as First Officer - Lt. Brace, R.N.R.

Ronald Millar as Third Officer - Lt. Johnson, RNVR

Jack Watling as Navigating Officer - Lt. Gordon, R.N.

Reginald Purdell as Coxwain - C / P.O. Dabbs

Caven Watson as Chief Engine Room Artificer - C / P.O. Duncan

Niall MacGinnis as Torpedo Gunner's Mate - C / P.O. Mike Corrigan

Leslie Weston as Leading Torpedo Operator - L / S Tug Wilson

Norman Williams as Periscope Operator - 'Canada'

Lionel Grose as Torpedo Operator - 'Spud'

David Peel as Helmsman - 'Oxford'

Philip Godfrey as Steward - 'Flunkey'

Walter Gotell as Luftwaffe Captain

Marie Ault as

Victor Beaumont as

Frederick Burtwell as

Franklyn Bennett as

George Cross as

Kenneth Evans as

Ian Fleming as

Philip Friend as

Pat Hagan as

Vincent Holman as

Joan Hopkins as

Vi Kaley as

Olaf Olsen as

Bryan Powley as

John Salew as

Gerik Schjelderup as

Johnnie Schofield as

Ian Selby as

John Slater as

Joan Sterndale-Bennett as

Vi Stevens as

Merle Tottenham as

David Trickett as

Robert Brooks Turner as

Beatrice Varley as

Ben Williams as

Ian Wilson as

Josephine Wilson as