FYI: I first saw this movie as a youngster and vividly remember it, even though I can't say it was one of my favorites. In late 2004, I watched episodes of Science-Fiction Theater, a TV series from the mid-1950's. An episode of the series titled "Beyond Return", aired in late 1955, presaged the movie with the same story and even specific points (the evolution of the meek terminally ill woman to a murderous villainess, the changing of the woman's hair color, etc.) by at least a year. The TV episode is credited to Doris Young but that may have been as screenwriter, not necessarily as the original author. I'm sure that both the TV program and "She Devil" are from the mind of Stanley Weinbaum's 1935 story titled "Adaptive Ultimate".
