Dr. Edward Pretorius, played by Ted Sorel, is a character in the 1986 film From Beyond.
Dr. Edward Pretorius is a scientist who has developed the Resonator, a machine that allows whoever is within range to see beyond normal perceptible reality. His assistant, Dr. Crawford Tillinghast, activates the machine and soon sees strange creatures in the air. When he is bitten by one of them, he notifies Pretorious about the machine's functionality. Pretorius then turns the machine on and, driven by a lust for power and knowledge, refuses to turn the Resonator off, even as it malfunctions at full power, causing Crawford to panic and flee. When the police arrive, they find Pretorius decapitated, yet no blood. Crawford is subsequently arrested and accused of murder.
Upon returning to the house, Dr. Katherine Michaels and Crawford rebuild the Resonator. Crawford reactivates the machine which causes more creatures to appear along with a severely deformed Pretorius. His consciousness having taken control of the creature that devoured his brain, Pretorius tells the trio of a world beyond that is more pleasurable than normal reality. A panicking Crawford shuts off the Resonator, making Pretorius and the creatures vanish.
The next morning, Katherine insists that the Resonator could shed light on the victims of schizophrenia, as well as possible treatments and suggests that they turn the machine back on, but Bubba and Crawford disagree. While Bubba and Crawford are asleep, Katherine gets back up to feel the pleasure from the machine and turns it back on, bringing forth a worried Crawford and the now-almost unrecognizable and mutated Pretorius. Bubba enters the scene as Pretorius grabs Katherine, preparing to eat her mind and take her to the world of beyond. Crawford and Bubba go down into the basement to shut off the power, but encounter a giant worm-like monster. Bubba succeeds in shutting off the power, rescuing Crawford and Katherine and sending Pretorius away.
When Bubba decides that they should leave the house, all of a sudden, Pretorius somehow returns and the Resonator turns back on, as all three of them run up into the attic to deactivate it. Katherine and Crawford are attacked by little bee-like creatures, and as Bubba pushes them out of the way, he is devoured to the bone. Crawford fights off Pretorius and succeeds in freeing Katherine, but then his enlarged pineal gland pops out of his forehead. Katherine short circuits the machine by spraying it repeatedly with a fire extinguisher.