Invasion of the Bee Girls (1973) is about a series of men who are getting murdered by women through sexual exhaustion.
Torso (1973) is about a mysterious killer who wears a hooded mask who terrorizes college art students in Italy with a knife.
The Baby (1973) is a story of a social worker investigating a family of a mother, two daughters, and an adult son with a mental capacity of an infant.
The Exorcist (1973) is about a girl who suffers from demonic possession. Two priests undergo an exorcism ritual to cast the demons out.