1940s SF

The owner of a coal mining operation, falsely imprisoned for fratricide, takes a drug to make him invisible, despite its side effect: gradual madness.

The Wolf Man and Count Dracula beg Dr. Edelman to cure them of their killing instincts but Dracula schemes to seduce the doctor's nurse.

Dr. Frankenstein's plans to replace the brain of his monster are hijacked by his scheming and malevolent assistant Ygor.

A deranged scientist escapes from prison and recruits Dracula, Frankenstein's monster and the Wolf Man to get revenge on his behalf.

A mad scientist turns a man into an electrically-controlled monster to do his bidding.

Dr. Jekyll allows his dark side to run wild after he drinks a potion that turns him into the evil Mr. Hyde.

After an accidental explosion in the lab, its inventor slips in and out of dream-like hallucinations, realizing that he had given the formula to one of his colleagues, who he tries to stop before it is too late.

A mad scientist working in the South American jungle miniaturizes his colleagues when he feels his megalomania is threatened.

An eccentric scientist helps a fugitive from the law become invisible, unwittingly giving him the power to exact revenge on his former friends.

Dr. Sovac transplants the brain of a gangster into his professor friend's body to save his life, but there is a side effect that causes a dangerous split personality.

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

A mad scientist develops an aftershave lotion that causes his gigantic bats to kill anyone who wears it.

A scientist, aided by an old hag and her two sons, kills virginal brides, steals their bodies, and extracts gland fluid to keep his ancient wife alive and young.

Jeff King in his experimental rocket suit battles the evil Dr. Vulcan.

A man returns from a trip to find fascists have taken over the U.S. government.

An adventure seeker and his fiancée visit an uncharted island, only to find that it is inhabited by deadly dinosaurs and other creatures ready to attack.

A ravaging plague has struck the Earth threatening no less than global extinction. This alien disease is believed to be the evil spawn of Ming, the merciless Emperor of Planet Mongo. The world's only hope now rests with Flash Gordon.

An attractive model with an ulterior motive volunteers as guinea pig for an invisibility machine.

Based on Verne's book The Mysterious Island, five POWs escape from a camp in a balloon during the Civil War and crash-land on an uninhabited island in the Pacific. Trying to settle with their lives they find someone is helping them.

The Invisible Man's grandson uses his secret formula to spy on Nazi Germany.

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

A mad scientist injects his enemies with an acromegaly virus, causing them to become hideously deformed.

A crazed scientist accidentally turns himself into a half ape, half human creature, and scrambles to find a cure.

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

Dr. Bernard Adrian is a kindly mad scientist who seeks to cure a young woman's polio. He needs spinal fluid from a human to complete the formula for his experimental serum.