Captain - Lt. Taylor, R.N.

John Mills

Hobson

Eric Portman

Leading Torpedo Operator - L / S Tug Wilson

Leslie Weston

First Officer - Lt. Brace, R.N.R.

Louis Bradfield

Coxwain - C / P.O. Dabbs

Reginald Purdell

Third Officer - Lt. Johnson, RNVR

Ronald Millar

Navigating Officer - Lt. Gordon, R.N.

Jack Watling

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

Niall MacGinnis

Ethel Dabbs

Joan Hopkins

Chief Engine Room Artificer - C / P.O. Duncan

Caven Watson

Alice Hobson

Josephine Wilson

Periscope Operator - 'Canada'

Norman Williams

Torpedo Operator - 'Spud'

Lionel Grose

Helmsman - 'Oxford'

David Peel

Steward - 'Flunkey'

Philip Godfrey

Mrs. Dabbs

Beatrice Varley

Luftwaffe Captain

Walter Gotell

Sidney Biggs

Frederick Burtwell

Marie Ault

Victor Beaumont

John Redmond

Drake

John Salew

Franklyn Bennett

Humphries

Philip Friend

(uncredited)

George Cross

(uncredited)

Kenneth Evans

Pincher

Robert Wilton

Ian Fleming

Charlie

John Slater

Pat Hagan

Vincent Holman

(uncredited)

Gerik Schjelderup

Vi Kaley

(uncredited)

Molly Johnson

(uncredited)

Franklin Bennett

Olaf Olsen

(uncredited)

Bryan Powley

(uncredited)

Merle Tottenham

(uncredited)

Joan Sterndale

Policeman in Chip Shop

Johnnie Schofield

Ian Selby

Joan Sterndale-Bennett

Charles Russell

Vi Stevens

David Trickett

Robert Brooks Turner

Ian Wilson