The city of Berlin is being terrorised by a notorious child molester and frustrated by the failure of the police to catch the culprit, the city's criminal underworld organises itself to hunt him down.
A nightmarish vision of mob justice which created the template for the serial-killer thriller, M is an arresting and unsettling cornerstone of Weimar-era cinema.
M review – Fritz Lang's superb thriller fascinates. Paranoia and a feverish atmosphere surround the hunt for a child-killer in this re-release of the chilling 1931 drama.Peter Bradshaw