The discovery of a perfectly preserved caveman prompts a mad scientist to attempt a daring brain transplant.
A strange animal attack turns a botanist into a bloodthirsty monster.
A mad scientist unleashes his master plan: to transform himself into a mutated walking catfish, and gain revenge on those who have spurned him. His plans go wrong, and he becomes tempted to kidnap a nubile young woman to similarly transform her so that he can breed.
A renegade federal agent uses a new drug to create an army of unbeatable warriors.
A story about a scientist who is obsessed with communicating with the dead.
Dr. Laurence, a once-respectable scientist, begins to research the origin of the mind and the soul. The science community rejects him, and he risks losing everything for which he has worked. He begins to use his discoveries to save his research and further his own causes, thereby becoming... a Mad Scientist, almost unstoppable...
For devilishly mad "astro-scientist" Dr. DeMarco (John Carradine), a typical day involves run-ins with reanimated corpses, bloodthirsty solar-powered killer robot zombies, Chinese communist spies and vicious Mexican secret agents. But when a bloody trail of young female murder victims leads an intrepid CIA agent to his door, things get really interesting. Ted V. Mikels directs this unique B horror-thriller.
A mad scientist crosses plants with people, and the results wind up in a sideshow.
A scientist working on cures for rare afflictions, such as a bone softening agent made from molds to allow him to correct the spinal deformity of his nurse, finds the physical causes of lycanthropy in wolf-man Larry Talbot and of vampirism in Count Dracula, but himself becomes afflicted with homicidal madness while exchanging blood with Dracula.
Upon arriving at the dilapidated estate of his mentor, Dr. Harker finds his former professor, Dr. Usher, radically changed. Instead of the reasoned scholar he once knew, a paranoid man is in his place and he's spiraling into madness.
In foggy London Dr Jekyll experiments on newly deceased women determined to discover an elixir for immortal life. Success enables his spectacular transformation into the beautiful but psychotic Sister Hyde who stalks the dark alleys of Whitechapel for young, innocent, female victims, ensuring continuation of the bloodstained research. With each transformation Sister Hyde becomes the more dominant personality, determined to eventually suppress the frail, ineffectual Dr Jekyll forever.
A scientist develops a formula which will cause animals to regress to the form of their primitive ancestors, and tries it on himself with disastrous results.
After a doctor kills his mistress and himself while researching the mysterious previous owner of his Boston home, his colleague, Dr. Norman Boyle, takes over his studies and moves his family into the Boston mansion. Soon after, Boyle's young son Bob becomes plagued by visions of a young girl, who warns him of the danger within the house.
Former Countess Clair and Professor Gruber conduct occult research in castle basement of Count Victor, re-animating people to kill for them.
The son of the infamous Dr. Orloff clashes with his father when he begins to stalk and dismember prostitutes to get parts to reanimate his dead mother.
A mad scientist uses captured criminals as experiments for his study on "the criminal mind" aboard his private ship.
A hunchback working in a morgue falls in love with a sick woman. He goes berserk when she dies and seeks help from a scientist to bring her back from the dead.
A crack team of professional Zombie Hunters team with a top female British security agent to save her sister from a mad scientist and stop his plan to procreate a new half-human half-zombie master race.
A mad scientist creates a hideous monster to carry out his murderous plans...
As novice detectives, Bud and Lou come face to face with the Invisible Man.