Let Sleeping Corpses Lie (, Do Not Profane the Sleep of the Dead; , Do Not Profane the Sleep of the Dead), also known as The Living Dead at Manchester Morgue and Don't Open the Window, is a 1974 Spanish-Italian science fiction zombie horror film written and directed by Jorge Grau and starring Ray Lovelock, Arthur Kennedy and Cristina Galbó. It focuses on two protagonists who are harassed by a local police investigator in the English countryside and are implicated in murders committed by zombies who have been brought to life by a farming tool designed to kill insects via ultra-sonic radiation. After being presented at the Sitges Film festival in Spain on September 30, 1974, the film was released in Italy on 28 November 1974 and was later released throughout 1975 in the United States and the United Kingdom under varying titles. In total, the film was released under more than 15 different titles internationally. In the following years, the film has become a cult picture. Plot George is taking a trip from an antique shop in Manchester to the Lake District. On the way, his Norton motorcycle is accidentally damaged by Edna while reversing her Mini Cooper at a petrol station. He demands she give him a lift to his destination, while Edna, on her way to visit her troubled sister, asks to go to the town of Southgate first, and to let George take her car to Windermere where she will later retrieve it. George agrees, but the two come to a dead end road alongside a river while searching for Edna's sister's house. George crosses the river on foot to a farm where several men from the Ministry of Agriculture are using an experimental machine in a field. While asking for directions, he inquires about their machinery, which they explain is designed to kill insects through ultra-sonic radiation. Meanwhile, while Edna waits at the car, she is attacked by a man who emerges from the river. She runs to find George for help, but her attacker is gone when they return to the car. Night falls and the film shifts focus: Edna's sister, Katie, is shown awaiting Edna's arrival, and is revealed to be addicted to heroin. Katie gets into an argument with her photographer husband, Martin, about her sister's impending arrival. Martin goes down to a waterfall near their remote cottage to complete a night-shoot