Professor Morlant, a British Egyptologist, seeks immortality through the power of a jewel buried in the tomb of an Oriental idol. Upon his death, Morlant returns to earth to seek vengeance upon those who removed the jewel from his grave.
A bizarre cult that practices a ritual of sacrificing humans terrorizes a young doctor and his wife, who have just moved to the group's village.
In an ancient castle, a mad scientist is trying to revive his dead daughter by an operation, but there are certain body parts he needs that he can't get. His problem is solved when a group of drunken party-goers stumble into his castle.
An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.
A rich actress who has gotten too old for leading roles employs a scientist who is working on a formula for eternal youth. The formula involves withdrawing certain fluids from the human brain. She takes the serum, but its unforeseen side effects turn her into a murderous monster.
Dr. Jackie Stevenson is a Los Angeles based therapist and scientist who tries to invent a serum to separate the pure from the lustful side of the female psychosis. After she has an unsuccessful experiment with a female client named Martine, which drove her patient to insanity and to a mental hospital, Jackie tries part of the serum on herself and becomes her lustful alter ego Heidi Hyde; a voracious lesbian who prowls the streets of L.A. after dark looking for carnal pleasures.
An invisible scientist escapes from an asylum and teaches high-school physics to nubile teens.
A woman must survive the night after she welcomes a neighbor's child into her home.
Dr. Janos Rukh discovers a certain type of radium that has almost magical healing properties. But the element has a dangerous side, too, and it has already started affecting Rukh. Consumed by paranoia, he begins to suspect that his wife is having an affair. Wild for revenge, Rukh hatches a deadly plot...using his own poisoned body as a weapon to kill.
All Brenda wants is a normal life with a normal boyfriend, but she soon finds that her boyfriend is anything but normal -- he's part of a Satanic cult that makes human sacrifices! A police-interrupted ritual at the cult's demonic temple lands Brenda in jail. Upon release, she has to pick up the pieces of her shattered life with the help of a protective lawyer, a hardened detective, and her old cellmate. But the cult hasn't forgotten Brenda, and they will stop at nothing to silence her... forever!
Two female Army agents go undercover at a Nazi prison camp to get information from a scientist being held there.
Rasputin, a crazed and debauched monk wreaks havoc at the local inn one night, chopping off the hand of one of the drinkers. As the bitter locals plan their revenge, the evil Rasputin works his power over the beautiful women who serve at the Tsar's palace. Even the Tsarina herself is seduced by his evil ways and, as his influence begins to dominate government policy, there is only one course of action left... to destroy him before he destroys them all.
Sixties couples Michael and Donna and Paul and Erica become involved with the intense Count Yorga at a Los Angeles séance, the Count having latterly been involved with Erica's just-dead mother. After taking the Count home, Paul and Erica are waylayed, and next day a listless Erica is diagnosed by their doctor as having lost a lot of blood. When she is later found feasting on the family cat the doctor becomes convinced vampirism is at work, and that its focus is Count Yorga and his large isolated house.
A child conceived by a mute servant girl transforms from an innocent youth to a killer beast at night with uncontrollable urges.
A young lawyer is involved with a ghostly woman in his new house, where the builder and his fiancée died shortly after it was built.
The owner of a coal mining operation, falsely imprisoned for fratricide, takes a drug to make him invisible, despite its side effect: gradual madness.
A team of environmentalists, including a reporter, her camera man, and an environmentalist's famous girlfriend charter a boat and with the captain, sail to a military island. They suspect the island is hosting to illegal activities. Upon arrival, however, they find no one. They finally reach a deserted house, where they find Dr. Susan Richardson, who tells them that everyone on the island is dead, including her father. Richardson's team were working on a compound that could make edible plants grow to super size, however the military intervened with plans of their own. They wanted to test the compound's effects on animals, and proceeded to feed it to several komodo dragons and cobras.
Egyptians Radu and Ma milk British tourists out of their money by offering phony tours of a mummy's tomb-- Radu has the girl lend her eyes to the "mummy" from inside an empty sarcophagus. When adventurer Wendland comes to visit the tomb, Ma is rescued and falls in love with him, leaving Radu in the dust. Needless to say, her former employer / captor follows them abroad in order to exact his revenge.
A young man named David unknowingly ventures into a land controlled by the powerful witch queen, Alotta, and her coven. Every year the local villagers must offer a child to the queen in order to maintain a pact of peace. But David has fallen in love with a river nymph named Yyala and he cannot have a relationship with her as long as he has a soul. So, he offers his soul to Alotta in exchange for the life of a sacrificial child. Now David and Yyala can be together, but if Yyala ever abandons him, his life belongs to the witch...
A couple, Maggie and Ben Porter, inherit an old farmhouse and move in, hoping to reinvigorate their marriage. When they learn the home was occupied long ago by a woman who was executed for practicing witchcraft, Maggie begins to have nightmares about her.