The Prodigal Daughter (1981)
A young woman in a deep depression leaves her husband and returns to her parents She discovers her father is having an affair, becomes jealous of his mistress and tries to turn his feelings in her direction
The Bird with the Crystal Plumage (1970)
An American writer vacationing in Rome attempts to unmask a serial killer he witnessed in the act of an attempted murder, and who is now hunting him and his girlfriend