A scientist experimenting with matter transmission from place to place by means of a laser beam suddenly decides to use himself as a test specimen. But the process goes awry, and one side of his body becomes hideously deformed and instantly lethal to anyone it touches.
In England, Professor Harrington begs his rival, Dr. Julian Karswell, to rescind a curse he inflicted on Harrington; in return, Harrington will cease his investigation into Karswell's Satanic cult. After learning that a parchment he gave Harrington has been destroyed, Karswell promises to do what he can. As Harrington arrives home, he perceives a gigantic demon in the trees. Harrington tries to escape in his car but crashes into power lines. The authorities declare electrocution as the cause of death.
While receiving a routine check-up, a woman finds herself stranded on the hospital's eighth floor, while someone dressed as a doctor is intent on her never leaving, even if it means killing any staff member who comes into contact with her.
The ultimate weapon, which was meant to be safe for humankind, produces global side-effects, including time slides and disappearances. The scientist behind the project and his car are transported from the year 2031 to 1817's Switzerland, where he finds Dr. Victor Frankenstein and his contemporaries.
Ippolita is a paralyzed young woman with serious mental problems stemming from the death of her mother. Her crisis of faith and the intervention of a well-meaning psychologist lead Ippolita to remember her past life as a witch during the Inquisition. Eventually, Ippolita becomes possessed and starts seducing local men, only to kill them. An exorcism seems to be the only solution to stop the madness.
Killjoy is back in the fourth installment of the demonic clown series. This time Killjoy is being accused of not being evil, since he let one of his victims(Sandie) get away. Killjoy must rely on his only chance of proving how evil he really is... get Sandie into hell as his witness.
Four college students on spring break are house sitting for their professor. Meanwhile, the professor is involved in a conjuring ceremony trying to raise the demon clown Killjoy for revenge. Killjoy is not going at it alone this time and raises three other demon clowns. The behemoth hobo clown, Punchy. The conjoined twins mime, Freakshow. And the crazy, seductive succubus Batty Boop. But who is the target of the Professor's revenge? Before Killjoy can get a name the Professor disappears and the demons are sucked into their realm. Back at the Professor's house Sandy and her classmates, Erica, Rojer and Zilla discover a mysterious package that was left overnight at the doorstep. Inside is a strange ornate mirror. The mirror transports the students into Killjoy's demon realm one by one where they have to survive the twisted diabolical trials that Killjoy has for them. Only when the Professor returns do they have any hope in challenging the demon clown and his posse. Culminating in a macabre feast the students finally discover who the object of the Professor's revenge ultimately is, and why he resurrected Killjoy!