In this classic German thriller, Hans Beckert, a serial killer who preys on children, becomes the focus of a massive Berlin police manhunt. Beckert's heinous crimes are so repellant and disruptive to city life that he is even targeted by others in the seedy underworld network. With both cops and criminals in pursuit, the murderer soon realizes that people are on his trail, sending him into a tense, panicked attempt to escape justice.

A landmark psychological thriller with arresting images, deep thoughts on modern society, and Peter Lorre in his finest performance.

'M' is a pioneering film, celebrated for its innovative sound, expressionist visuals, and intricate depiction of a serial killer. Peter Lorre's performance is lauded for its depth. The film delves into psychological and sociological themes, creating a suspenseful atmosphere. Some find the pacing slow and note its age, yet many regard it as a timeless masterpiece, influencing later serial killer films.