She Devil is a 1957 American widescreen science fiction horror film, shot in RegalScope, from Regal Films, that was produced, written, and directed by Kurt Neumann. The film stars Mari Blanchard, Jack Kelly, and Albert Dekker and was theatrically released by 20th Century-Fox on a double bill with Regal's Kronos.

Plot

Dr. Dan Scott has developed a serum that cures the ills of animals on the theory that all living organisms can adapt to their environment when it comes to harmful situations, with a serum based on the most adaptive qualities in the fruit fly. He has tried it on cats, chimpanzees, and leopards, and the formula seems to work, curing pneumonia in a hamster, mending a broken spine of a cat and healing lacerations from a panther. One odd quality comes through in it changing the color of a leopard in one instance. Eager to try it on a human being, despite his mentor Dr. Richard Bach's many concerns, Scott finds a consenting patient in Kyra Zelas, a woman with a meek personality who is dying of tuberculosis.