Best Mystery Movies of 1980

A mysterious blonde woman murders one of a psychiatrist's patients, and now she's after the prostitute who witnessed it.

A serial killer brutally slays and dismembers several gay men in New York's S&M and leather districts. The young police officer Steve Burns is sent undercover onto the streets as a decoy for the murderer. Working almost completely isolated from his department, he has to learn and practice the complex rules and signals of this little society.

Julian makes a lucrative living as an escort to older women in the Los Angeles area. He begins a relationship with Michelle, a local politician's wife, without expecting any pay. One of his clients is murdered and Detective Sunday begins pumping him for details on his different clients, something he is reluctant to do considering the nature of his work. Julian begins to suspect he's being framed. Meanwhile Michelle begins to fall in love with him.

This slasher movie follows a relentless killer who is out to avenge the death of a young girl who died after being bullied and teased by four of her classmates. Now high-school students, the guilt-ridden kids have kept their involvement a secret, but when they start being murdered, one by one, it's clear that someone knows the truth. Also coping with the past are members of the dead girl's family, most notably her prom-queen sister, Kim Hammond (Jamie Lee Curtis).

Jane Marple solves the mystery when a local woman is poisoned and a visiting movie star seems to have been the intended victim.

Alex Linden is a psychiatrist living in Vienna who meets Milena Flaherty though a mutual friend. Though Alex is quite a bit older than Milena, he's attracted to her young, carefree spirit. Despite the fact that Milena is already married, their friendship quickly turns into a deeply passionate love affair that threatens to overtake them both. When Milena ends up in the hospital from an overdose, Alex is taken into custody by Inspector Netusil.

Col. Vincent Kane is a military psychiatrist who takes charge of an army mental hospital situated in a secluded castle. Among Kane's many eccentric patients is Capt. Billy Cutshaw, a troubled astronaut in the midst of an existential crisis. Although Kane's own grasp on sanity is questionable, he manages to engage Cutshaw in a series of thoughtful conversations about science and faith that deeply affect the lives of both men.

The lord and lady of a capacious manor are killed, and the lord's ghost seems to have returned to knock off the staff one by one, causing Inspector Winship and Dr. Tart to investigate the wacky house and its inhabitants.

The gang goes to Hollywood as Scooby-Doo stars in his first film. When a creepy creature wants to put a stop to the film, Scooby-Doo must solve the mystery to ensure his star status remains intact.