After landing on a mysterious planet, a team of astronauts begin to turn on each other, swayed by the uncertain influence of the planet and its strange inhabitants.
A young girl is killed at the beach in Malibu. Professor Otto Lindsay suspects that it is some form of mutated fish. However, his son Richard, who was a good friend of the girl, thinks that it is a madman who has a grudge against Richard and his friends. Soon the list of victims grows.
Verden Fell is shattered after the death of his lovely wife. But, after an unexpected encounter with Lady Rowena Trevanion, Fell soon finds himself married again. Nevertheless, his late wife's spirit seems to hang over the dilapidated abbey that Fell shares with his new bride. Lady Rowena senses that something is amiss and, when she investigates, makes a horrifying discovery -- learning that Fell's dead wife is closer than she ever imagined possible.
Those who have interfered with the Tomb of Ra-Antef are in terrible danger. Against expert advice, American showman and financial backer of the expedition, Alexander King, plans a world tour exhibiting this magnificent discovery from the ancient world but on the opening night the sarcophagus is void of its contents. The mummy has escaped to fulfill the dreadful prophesy and exact a violent and bloody revenge on all those who defiled his final resting place.
A scientist carelessly dumps some toxic waste into a river. The gardener at a nudist camp drinks the water, turns into a monster and attacks all the (female) nudists.
A theater troupe's young, energetic leader has secured an old theater in which to produce his new production. The theater's elderly caretaker urges the group to leave at once. A vampire is awakened and discovers that one of the troupe is the reincarnation of the woman who he once loved.
Count Karnstein sends for a doctor to help his sick daughter Laura. Her nurse believes she is possessed by the spirit of a dead ancestor, Carmilla. A young woman becomes intrigued by the mysterious deaths surrounding Laura after a carriage accident outside the castle forces her to stay. They become close friends until Laura becomes convinced the spirit of Carmilla is forcing her to kill.
Isabella, a young model, is murdered by a mysterious masked figure at a fashion house in Rome. When her diary, which details the house employees' many vices, disappears, the masked killer begins killing off all the models in and around the house to find it.
When a cynical journalist accepts a wager that he won't survive the night in a haunted castle, it unlocks an odyssey of sexual torment, undead vengeance, and a dark seductress who surrenders the gravest of pleasures.
Experimenting in hypnotic regression to past lives, Dr. Edmund Redding of the Cowan Institute in Pasadena has discovered that Ann Taylor is a reincarnated Aztec woman. Via her recovered memories, she is able to lead Redding and his associates to a hidden chamber in the Great Pyramid of Yucatan, where they hope to find the lost treasure of the Aztecs. Instead, they find two mummified bodies - one of a modern man, quite dead, and the other of an ancient Aztec, quite alive. They are able to return safely to Pasadena with both finds, but a rival professor, Janney, kills Redding and steals the body of the modern man-mummy. This he subjects to a resurrection experiment, which works - only the mummy proves to be a werewolf. Two supernatural menaces roam the city that night. This film is composed of footage from two unrelated Mexican horror movies, LA CASA DEL TERROR and LA MOMIA AZTECA, plus new footage shot in the U.S. by Jerry Warren.
A widow deceives her late husband's mother and brothers into thinking he's still alive when she attends the yearly memorial to his drowned sister, hoping to secure his inheritance, but her cunning is no match for the demented, axe-wielding thing roaming the grounds of the family's Irish estate.
Honeymooning in Bavaria, a young couple becomes stranded and is forced to stay the night in the area. Doctor Ravna, owner of the impressive chateau that sits imposingly above the village, invites them to dinner that evening. Their association with Ravna and his charming, beautiful family is to prove disastrous.
After an astronaut space capsule is detonated in orbit, with the astronaut begging to be killed, a teenager couple finds a severed arm on a remote beach. The boy takes the arm home, where it becomes animate and the alien force which animates it soon possesses his mind as well.