A mad doctor uses patients at his isolated psychiatric institute as subjects in his attempts to create longevity by surgically installing an artificial gland in their skulls.

In 19th century England, a noted brain surgeon rescues a former student from being hanged on a false conviction for murder, and spirits him away to an ancient, repurposed abbey far in the countryside. There, he connives his pupil into assisting him in mapping the functions of the various parts of the human brain, using living subjects who are under a terrible animation-suspending drug called "black sleep". Subsequently, the student, along with the daughter of one of the subjects, discover that most of these subjects have survived but are being kept in a dungeon-like cellar, in various stages of physical and mental derangement...

A refugee Soviet scientist arrives at a desert airport carrying secret documents, but is attacked by a pair of KGB assassins and escapes into the desert, where he comes in range of an American nuclear test and is transformed into a mindless killing beast.

Slammin’ Sammy Menacker is killed in the ring, and Gorgeous George is arrested for murder. Out to clear his name is his manager Lorraine and cop Ron Peterson, who was already on the scene to investigate the Mob’s influence on pro wrestling.

A female version of the man in the iron mask. In this version the mask is put on a princess (patricia medina) rather than a prince as in the original book by Alexander Dumas.

Detective Lt. Dan Bradley (Duke Moore) interrupts his opera night to investigate strange sightings of ghosts at a remote farmhouse where a mad doctor had experimented with monsters several years earlier (Bride of the Monster?) Along with him goes faint-hearted patrolman Kelton (Paul Marco). What they find is that fake spiritualist Dr. Karl Acula (Kenne Duncan) is running a spiritualist con game, bilking people into thinking they can contact dead relatives for a hefty fee. Karl's conniving girlfriend Sheila (Valda Hansen) cruises the grounds like a ghost for an undisclosed reason, as well, and the Karl has the goonish, giant Lobo (Tor Johnson, apparently survived from the previous film with gross facial scars) for use as a henchman. As the cops close in on Karl's racket, it becomes clear that there are other ghosts haunting the premises - that aren't Dr. Acula's cheap illusions.

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.

There are some movies that are so bad they're good. And there are some movies that are so bad- that they're just bad...