Impulse (1974) Sleazeball Shatner (who's no Burt Reynolds, the movie tells us) preys on rich widows. One potential step-daughter/orphan-to-be is having none of it. TIL: Canon law forbids you from ever remarrying if you murder a spouse to be with someone else. Now you know.
Your daily dose of culture courtesy of She Demons (1958) - "Beware of pretty faces that you find, a pretty face can hide an evil mind." - Johnny Rivers