Black Christmas (1974)

This is a surprisingly scary film with Olivia Hussey as a level-headed college student who begins receiving deranged and obscene phone calls. Shortly afterwards, one of her sorority sisters disappears. It soon becomes apparent to the audience that a crazed killer is on the loose. Who could it be? The “high strung” (asshole) artist boyfriend played by Keir Dullea? The drunken bad girl of the house (Margot Kidder)? Or perhaps the impeccably combed-over cop (John Saxon)? You’ll never guess!