Summer of 84 brings serial killer horror to a nostalgic 80s backdrop, creating a chilling modern take on a classic concept. Frailty adds religious fervor to the murder mystery genre, crafting a tense thriller with a creative twist ending. M, a classic from 1931, remains a smartly-produced, influential film chronicling the hunt for a child murderer.

Serial killers are a popular topic in movies, but not every great film using them as subject matter is as widely seen as it may deserve. The morbid fascination with repeat murderers is something of a staple in cinema, with both past hits and modern classics like the recently-released Longlegs featuring serial killers prominently. But there are plenty of incredible films centered on the topic that have somehow evaded popularity, despite the excellence with which they portray human killers.

It goes without saying that many serial killer films fall into the genre of horror, with...