A doctor's research into the roots of evil turns him into a hideous depraved fiend.
Dr. Henry Jekyll believes that there are two distinct sides to men - a good and an evil side. He believes that by separating the two, man can become liberated.
An obsessed scientist conducts profane experiments in evolution, eventually establishing himself as the self-styled demigod to a race of mutated, half-human abominations.
Dr. Jekyll believes good and evil exist in everyone and creates a potion that allows his evil side, Mr. Hyde, to come to the fore.
Mad scientist injects his enemies with acromegaly virus, causing them to become hideously deformed.
Paula, the ape woman, has survived the ending of CAPTIVE WILD WOMAN and is running around a creepy old sanitarium run by the kindly Dr.
The son of the notorious Dr. Henry Jekyll is determined to prove that his father's reputation has been unjustly deserved.
As American policemen in London, Bud and Lou meet up with Dr. Jekyll and Mr. Hyde.
When scientists exploring the Amazon River stumble on a “missing link” connecting humans and fish, they plan to capture it for later study.
In a tributary of the Amazon, a monster – half-man, half-fish – is captured and placed in a reservoir in a Florida national park to be observed by scientists.
The first manned spacecraft, fired from an English launchpad, is first lost from radar, then roars back to Earth and crashes in a farmer's field, and is found to contain only one of the three men who took off in it; and he is unable to talk but appears to be undergoing a torturous physical and mental metamorphosis.
Four astronauts returning from man's first mission to Mars enter a time warp and crash on a 26th Century Earth devastated by atomic war.
A dangerous combination of radiation and insecticide causes the unfortunate Scott Carey to shrink, slowly but surely, until he is only a few inches tall.
A young woman discovers she is the daughter of the infamous Dr. Jekyll, and begins to believe that she may also have a split personality, one of whom is a ruthless killer.
A psychiatrist treats a woman who is convinced that she turns into a killer leopard because of a family curse.
Industrialist François Delambre is called late at night by his sister-in-law, Helene Delambre, who tells him that she has just killed her husband, André. Reluctant at first, she eventually explains to the police that André invented a matter transportation apparatus and, while experimenting on himself, a fly entered the chamber during the matter transference.
A college paleontology professor acquires a newly discovered specimen of a coelecanth, but while examining it, he is accidentally exposed to its blood, and finds himself periodically turning into a murderous Neanderthal man.
The first pilot to leave Earth's atmosphere lands, then vanishes; but something with a craving for blood prowls the countryside...
Under therapeutic hypnosis, a seemingly well-adjusted young woman tells a fantastic story, verified by lie detector, of her forgotten marriage to a man who disappeared on the day of their honeymoon, and of her search for him which takes her to a lonely mansion in a remote section of swampland tenanted by snakes, alligators, a drunken one-armed lout, a mysterious doctor, and a cold-hearted elderly woman who lives alone in a brooding manse.
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