One Dark Night (also known as Entity Force) is a 1982[i] American supernatural horror film directed by Tom McLoughlin, and starring Meg Tilly, E. G. Daily, and Adam West.

It was given a limited platform release in the United States on July 9, 1982, before receiving wide distribution by Comworld Pictures in January 1983.

The police find six girls murdered in the apartment of famed Russian occultist Karl Raymarseivich Raymar, and they can't explain it.

His estranged daughter, Olivia McKenna, and her husband Allan are unaware of this until they meet Samuel Dockstader, a feature writer for The World of the Occult.

While they succeed in frightening Julie, who locks herself in the chapel, they are unaware that Raymar is slowly reawakening by using his powers to make the walls shake, windows explode, and doors slam shut.

Back at the mausoleum, Raymar finally breaks out of his coffin and controls the rotting corpses and the doors with his psychic powers.

Not having much success with selling several comedy screenplays, McLoughlin and his friend Michael Hawes decided to make a gothic horror film similar to the works of Edgar Allan Poe.

As McLoughlin recalled, "There was a version of the movie that wasn't shown in theaters, where there was this passing of Ramar's energies to the Meg Tilly character...

[12] Steve Barton of Dread Central rated it 4/5 stars and called it a guilty pleasure that is horrible in an endearing way.

[13] TV Guide awarded the film 2/4 stars, commending McLouglin's direction, acting, and special make-up effects.

[14] Annie Riordan of Brutal as Hell called it a dull and formulaic horror film, recommended only to hardcore fans of the cast.

[10] Bryan Pope of DVD Verdict called it "good, scary fun" and also highlighted the final gory sequence.