Conrad Veidt as Captain Ernst Hardt

Sebastian Shaw as Ashington

Valerie Hobson as The School Mistress

Marius Goring as Lieutenant Felix Schuster

June Duprez as Anne Burnett

Athole Stewart as The Rev. Hector Matthews

Agnes Lauchlan as Mrs. Matthews

Helen Haye as Mrs. Sedley

Cyril Raymond as The Rev. John Harris

George Summers as Captain Ratter

Hay Petrie as Engineer

Grant Sutherland as Bob Bratt

Robert Rendel as Admiral

Mary Morris as Chauffeuse

Margaret Moffatt as Kate

Kenneth Warrington as Commander Denis

Torin Thatcher as Submarine Officer

Esma Cannon as Maggie

Cyril Chamberlain as Bit Part (uncredited)

Bryan Herbert as Corporal Guarding POW's on Ferry

Skelton Knaggs as German Sailor looking for Capt. Hardt

Howard Marion-Crawford as German Officer in Kieler Hof Hotel

Bernard Miles as Hans - Hotel Receptionist

John Penrose as Newlywed at Kiel Hotel

Johnnie Schofield as Armed Guard of POWs on Ferry

Diana Sinclair-Hall as Undetermined Minor Role (uncredited)

Graham Stark as Bell Boy (uncredited)

Jack Lambert as Passport Official (uncredited)

Jeanne Macintyre as German Girl (uncredited)

Jack Sharp as