Donovan's Brain

A millionaire's brain is preserved after his death, and telepathically begins to take control of those around him.

Scientist becomes obsessed with the idea of communicating with his dead wife.

A scientist's thoughts materialize as an army of invisible brain-shaped monsters (complete with spinal-cord tails!) who terrorize an American military base in this nightmarish chiller.

A strange prehistoric beast lurks in the depths of the Amazonian jungle. A group of scientists try to capture the animal and bring it back to civilization for study.

Scientists and American Air Force officials fend off a bloodthirsty alien organism while at a remote arctic outpost.

A scientist seeks to transplant a brain into the body of a thawed caveman in order to get it to do his bidding.

A scientist captures the Creature and turns him into an air-breather, only for him to escape and start killing.

Having escaped execution and assumed an alias, Baron Frankenstein transplants his deformed underling's brain into a perfect body, but the result proves to be mortally perilous.

A scientist experiments with crossing humans and plants, for which he uses his students.

A scientist finds a way of becoming invisible, but in doing so, he becomes murderously insane.

Extraterrestrials traveling in high-tech flying saucers contact a scientist as part of a plan to enslave the inhabitants of Earth.

A spider escapes from an isolated Arizona desert laboratory experimenting in gigantism and grows to tremendous size as it wreaks havoc on the local inhabitants.