The Man Who Never Was (1956)
In order to fool the Germans into thinking the Allied invasion of Sicily will take place elsewhere, British Military Intelligence comes up with a cunning ruse
The Horrible Dr. Hichcock (1962)
In 19th century London, a woman weds a doctor with necrophiliac tendencies, and whose first wife died under mysterious circumstances and might be coming back from the grave to torment her successor
Spiders Web (1982)
The wife of a Foreign Office diplomat discovers a body in the drawing room of her house in Kent