From Beyond is a 1986 horror-science fiction film, directed by Stuart Gordon. It’s based on the short story of the same name by HP Lovecraft. The film takes a lot of liberties with the original story, particularly in the realm of adding T&A to the story, probably to increase the commercial appeal.
Lovecraft’s fiction generally revolved around the idea that there are hidden realms, just on the threshold of human perception, and his characters are simultaneously fascinated and terrified by these realms and their inhabitants.
The basic premise of the story and film is the invention of a device, “the resonator”, which makes an unseen world, which exists in parallel to our own reality, visible and tangible. The problem is that the device attracts creatures from this other realm and allows them attack people. In the film, the device’s creator, Dr. Crawford Tillinghast (Jeffrey Combs), is accused of killing and decapitating his colleague and financial backer, Dr. Edward Pretorius (Ted Sorel). (Pretorius, incidentally, is the name of another mad scientist in the 1935 Bride of Frankenstein.)