Plot: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.

Plot:Ygor discovers Frankenstein's creation is still alive and brings him to the Doctor's son, Ludwig, for help. Obsessed with restoring the monster to his full potential, Ludwig is unaware that someone has more devious plans for the creature.

Plot:An obsessed scientist conducts profane experiments in evolution, eventually establishing himself as the self-styled demigod to a race of mutated, half-human abominations.