Anthony Asquith Director Eddie Albert Major MacMahon Actor Paul Massie Gene Summers Actor Lillian Gish Mrs. Summers Actor James Robertson Justice Naval Commander Actor Irene Worth Leonie Actor Leslie French Marcel Lafitte Actor John Crawford Maj. Kimball Actor Lionel Jeffries Interrogator Actor Sandra Dorne Blonde with german officer Actor Nicholas Phipps Lecturer lieutenant Actor Anne Blake Mme. Lafitte Actor Miki Iveria Louise Actor Lillie Bea Gifford Mauricette Actor Launce Maraschal Gen. Nolan Actor Robert Henderson Col. Snyder Actor William E. Greene Mitchell Actor Anthony Havelock-Allan Producer Paul Dehn Screenwriter George St. George Screenwriter Benjamin Frankel Original Music Desmond Dickinson Cinematographer Gordon Hales Film Editing John Howell Art Director