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In a city terrorized by a serial killer who targets children, the criminal underworld, fed up with police interference, decides to hunt down the murderer themselves. They enlist the help of a notorious burglar to coordinate the manhunt, leading to a dramatic chase and a clandestine trial by the underworld.

Fritz Lang's 'M' is widely regarded as a landmark of suspense cinema, praised for its innovative use of sound, its chilling portrayal of a child murderer, and its exploration of mob justice and collective guilt. It was a critical and commercial success upon release and remains a powerful and influential film.

• A masterclass in suspense and psychological thriller filmmaking.

• Groundbreaking use of sound design and non-linear narrative.

• Chilling performance by Peter Lorre as the disturbed child murderer.

Google audience: Viewers are captivated by the film's suspenseful atmosphere and Peter Lorre's unforgettable performance. Many praise its innovative techniques and enduring impact on cinema, although some find the subject matter disturbing.

The distinctive whistling tune that the child murderer, Hans Beckert, whistles throughout the film is Edvard Grieg's 'In the Hall of the Mountain King'. Fritz Lang chose it because it was a tune a child killer might subconsciously whistle.