J.P. Kennedy

饰：Admiral William Sowden Sims

Roy Travers

饰：Captain von Hagg

Douglas Herald

饰：Kapitan-Leutenant Stockmar - U-Boat 24

Jack McEwan

饰：Ober-Leutenant Schwartz - U-Boat 24

Charles Emerald

Alec Hurley

Terence O'Brien

Harold Auten

饰：Himself - Lt. Cdr. Harold Auten

Val Gielgud

George Turner

Earl Jellicoe

饰：自己