Young couple Scott and Mary are on their way to a Halloween party when their car breaks down, and they encounter a creepy castle where Dr. Frankenstein seeks to put Scott's brain in his monstrous creation. As for Mary, Count Dracula wants her for his mistress.
A mad scientist creates a monster called "Mosaico," who breaks out of the laboratory to hunt down and kill beautiful women.
Two screwballs get mixed up with monsters, mad scientists and vampires.
Dr. Victor Frankenstein creates a monster to show his scientific theories, but soon leaves him. So the scientist tries to rebuild his life getting married with Janet, and retires to his castle with Igor. However the monster comes back to haunt Frankenstein, and so Victor finds out that the monster has ferocious sexual orientation to Janet. Frankenstein then calls the servant Igor to readjust the monster, but also Igor takes advantage of Janet...
Some kind of sadist, but not human, is murdering people. A doctor is convinced that the killings are the evil workings of a reclusive odd baron who died many years ago.
Deranged scientist, Gustav Niemann, escapes from prison and overtakes the director of a traveling chamber of horrors, soon reviving the infamous Count Dracula, the frozen Frankenstein Monster, and the Wolf Man.
A deformed tormented girl drowns herself after her lover is framed for murder and guillotined. Baron Frankenstein, experimenting with the transfer of souls, places the boy's soul into her body, bringing Christina back to life. Driven by revenge, she carries out a violent retribution on those responsible for both deaths.
Victor Frankenstein witnesses his creation turn uncontrollable after he's duped by his associate, Dr. Polidori.
Judith Fontaine is looking for her sister Joanie, who has disappeared into the hippie community of Venice, California. It turns out that Joanie has become fallen victim to Groton, an axe-wielding homicidal maniac under the employ of Dr. Durea, the last living descendant of the Frankenstein family and is now both running a house of horrors on the beach's boardwalk and performing experiments on Groton's victims in his basement laboratory.
Rescued from the guillotine by his devoted dwarf Fritz, the Baron relocates to Carlsbruck, where he continues his gruesome experiments.
Dr Simon Helder, sentenced to an insane asylum for crimes against humanity, recognises its director as the brilliant Baron Frankenstein, the man whose work he had been trying to emulate before his imprisonment. Frankenstein utilises Helder's medical knowledge for a project he has been working on for some time. He is assembling a man from vital organs extracted from various inmates in the asylum. And the Baron will resort to murder to acquire the perfect specimens for his most ambitious project ever.
Gaira, a humanoid sea beast spawned from the discarded cells of Frankenstein's monster, attacks the shores of Tokyo. While the Japanese military prepares to take action, Gaira's Gargantua brother, Sanda, descends from the mountains to defend his kin. A battle between good and evil ensues, leaving brothers divided and a city in ruins.
When Dr. Frankenstein is killed by a monster he created, his daughter and his lab assistant continue his experiments.
A mad doctor puts together a new body by using body parts he steals from a mortuary at the hospital where he works.
Mad Dr Frankenstein recruits an evil dwarf, a Neanderthal man, and others to help him put a brain in the body of a brute.
During WWII, Germans obtain the immortal heart of Frankenstein's monster and transport it to Japan to prevent it being seized by the Allies. Kept in a Hiroshima laboratory, it is seeming lost when the United States destroys the city with the atomic bomb. Years later a wild boy is discovered wandering the streets of the city alone, born of the immortal heart.
Eddie is a Vietnam veteran who loses his arms and legs when he steps on a land mine, but a brilliant surgeon is able to attach new limbs. Unfortunately, an insanely jealous assistant (who has fallen in love with Eddie's fiancée) switches Eddie's DNA injections, transforming him into a gigantic killer.
After the death of Victor Frankenstein, two figures vie for control of his monster and the radical technology that created him: the scientist's daughter, and an immortal wizard assisted by a blind bird-woman with an unquenchable thirst for blood.
The baron's grandson rents the family castle to a TV crew to fund his atomic revival of the family monster.
Four balloonists and their dog are stranded on a remote island with a woman believed to be a descendant of Frankenstein, who is conducting experiments on lost sailors.