Let Sleeping Corpses Lie (Spanish: No profanar el sueño de los muertos, lit.

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.

A co-production between Spain and Italy, Let Sleeping Corpses Lie premiered at the Sitges Film Festival on 30 September 1974, where it won awards for Best Actress (for Galbo) and Best Special Effects.

However, a woman named Edna Simmons accidentally damages his motorbike while reversing her car at a petrol station.

Katie's photographer husband Martin goes down to a waterfall near their remote cottage to complete a shoot of plant specimens.

George, forced to stay in Southgate as a person of interest in the investigation, secretly takes the roll of film from Martin's camera to a chemist to have it developed.

At the chemist's, George and Edna collect the photos, but Martin's killer does not appear in any of the pictures; the man is actually a vagrant who drowned in the river.

Meanwhile, the Inspector finds Craig and the caretaker's bodies, and, thinking that Edna and George may be devil worshippers, he issues orders "to shoot to kill."

Filming took place on-location in North West England and Lazio, Italy, and at Cinecittà Studios.

[3][4] Some scenes were filmed in the Peak District in Derbyshire, not far from Sheffield, principally in Castleton which stands in for the fictional village of 'Southgate,' and the dramatic Winnats Pass, which has the church superimposed onto it.

It is part of the DVD Stephen Romano Presents Shock Festival, which was released on 8 January 2010 in the United States.

[5] The film premiered in Spain on 30 September 1974, in Italy on 28 November 1974, and was released in the United States in 1975 under the title Don't Open the Window, frequenting the drive-in circuits and cinemas paired as a double feature with The Last House on the Left (1972).

According to Edgar Wright, the promotion of the film during its exhibition in the United States was one of the inspirations for the fake trailer Don't, which appears in the 2007 release Grindhouse.

[6] From a contemporary review, Verina Glaessner of the Monthly Film Bulletin said the film was extremely close to Night of the Living Dead but praised the direction of Jorge Grau, referring to him as a "director with genuine talent for the macabre mood and unsettling detail"[7] Rotten Tomatoes, a review aggregator, reports that 86% of 21 surveyed critics gave the film a positive review; the average rating was 7.35/10.

[11] The film was released for the first time on video and DVD in the U.S. in 2000 by Anchor Bay Entertainment under the Let Sleeping Corpses Lie title.

In 2008, Blue Underground released the film yet again, only this time in a special edition DVD and Blu-ray under the Living Dead at the Manchester Morgue title.