Noël Coward

Captain E. V. Kinross R.N. / Captain 'D'

John Mills

Ordinary Seaman Blake / Shorty Blake

Bernard Miles

Chief Petty Officer Hardy / Walter Hardy

Celia Johnson

Mrs. Kinross / Alix

Kay Walsh

Freda Lewis / Freda

Joyce Carey

Mrs. Hardy / Kath

Derek Elphinstone

No. 1

Michael Wilding

Flags

Robert Sansom

Guns

Philip Friend

Torps