Dr. Henry Jekyll is a well-regarded physician whose evenings are spent researching a rare and sacred Amazonian flower so potent it's said to literally separate the soul, giving life to man's Dark Self. The obsessive experiments to isolate its psychotropic properties happen to coincide with a series of brutal murders gripping the city with fear. Jekyll knows it's no coincidence. While his nights are lost to him, he awakens with bloody mementos and violent memories of the screams of his victims.
A crazed scientist creates a nerve gas that turns the local teenagers into her unquestioning slaves.
A fugitive doctor tries to raise the dead for South Sea Islanders.
Dr. Eric Vornoff, with the help of his mute assistant Lobo, captures twelve men for a grisly experiment; His goal to turn them into supermen using atomic energy. Reporter Janet Lawton, fiancée of the local lieutenant, vows to investigate Vornoff's supposedly haunted house.
Secretly engineered and blasted into space by government scientists, a vile monster crash-lands back on Earth and begins killing everyone it encounters. As the death toll rises, veteran cop McLemore bravely steps forward to crush the scary creature.
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.
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.
After experimenting on himself and becoming invisible, scientist Jack Griffin, now aggressive due to the drug's effects, seeks a way to reverse the experiment at any cost.
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 mad scientist crosses plants with people, and the results wind up in a sideshow.
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.
A renegade federal agent uses a new drug to create an army of unbeatable warriors.
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.
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.
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.