If It's a Man – Hang Up! (1975)

Troubled divorcee Mary Kee is tormented by a series of sinister phone calls from a mysterious woman. When the stranger reveals she's calling from the past, Mary tries to break off contact. But the caller doesn't like being ignored, and looks for revenge in a unique and terrifying way...

When their daughter is abducted by experienced kidnappers, the Jennings turn the tables on their seemingly fool-proof plan.

On Halloween night, a sorority house is overrun with ghosts, while a vengeful housemother goes on a killing spree.

A young woman moves to a high-rise apartment building and soon begins to be tormented by an unknown stalker who seems to know her every move.

A college student renting an old room in a boarding house discovers a plot by sinister, otherworldly forces to sacrifice his neighbor's infant.

A student babysitter has her evening disturbed when the phone rings. So begins a series of increasingly terrifying and threatening calls that lead to a shocking revelation.

As a top student at St. Adeline's Catholic Boarding School, Zoe senses that something is not quite right about the school's new nun-- a sense proven to be true when it is revealed the "good' nun is an imposter with a fatal attraction to Zoe's brother.

When a teenage girl is miraculously saved by a heart surgeon, the doctor begins to flirt with her. Her father doesn’t believe her and unbeknownst to all, the doctor is obsessed with the girl.

A slick New York publicist who picks up a ringing receiver in a phone booth is told that if he hangs up, he'll be killed... and the little red light from a laser rifle sight is proof that the caller isn't kidding.

A realtor and her daughter are taken hostage by armed robbers.