She Devil (1957 film)

She Devil is a 1957 American science fiction horror film directed by Kurt Neumann, and starring Mari Blanchard, Jack Kelly and Albert Dekker.

The serum seems to cure her instantly. It also dramatically affects her personality, Kyra shows a flash of temper, then jumps out of a car and runs into a shop, where she steals a dress and disguises her identity by willing her hair color to change from brunette to blonde.Scott falls in love with her. At a party, however, Kyra seduces a guest, Barton Kendall, and when his wife Evelyn objects, Kyra disguises herself again and murders her. Then she marries Kendall, but behaves monstrously toward him. The doctors use a ploy that leaves Kyra in an unconscious state, then perform surgery to reverse the serums effect, which also restores Kyras terminal disease. ........

Source: Wikipedia