FADE IN:

The Entity is a brilliant, underrated horror film from 1982.

From the first page:

"The story you are about to see is based upon a real life investigation in Los Angeles, California. It is considered by psychic researchers throughout the world to be one of the most unique documented cases of the supernatural ever recorded."

IMDB here: https://www.imdb.com/title/tt0082334/
Screenplay here:

The Entity is a brilliant, underrated horror film from 1982.

From the first page:

"The story you are about to see is based upon a real life investigation in Los Angeles, California. It is considered by psychic researchers throughout the world to be one of the most unique documented cases of the supernatural ever recorded."

IMDB here: https://www.imdb.com/title/tt0082334/
Screenplay here:
 https://assets.scriptslug.com/live/pdf/scripts/the-entity-1983.pdf

There is nothing more powerful in this world than words.

I saw this haunting film in the 1980s and it scared the daylights outta me. (I was pretty young, but still). 

Made such a lasting impression on me that I can still remember some of the scenes vividly to this day.

Not sure I'd ever watch it again. But I agree that it's underrated.