Metropolis is a 1927 German expressionist science-fiction silent film directed by Fritz Lang and written by Thea von Harbou in collaboration with Lang from von Harbou's 1925 novel of the same name (which was intentionally written as a treatment). It stars Gustav Fröhlich, Alfred Abel, Rudolf Klein-Rogge, and Brigitte Helm. Erich Pommer produced it in the Babelsberg Studios for Universum Film A.G. (UFA). The silent film is regarded as a pioneering science-fiction movie, being among the first feature-length movies of that genre. Filming took place over 17 months in 1925–26 at a cost of more than five million Reichsmarks, or the equivalent of about € million.
Made in Germany during the Weimar period, Metropolis is set in a futuristic urban dystopia and follows the attempts of Freder, the wealthy son of the city master, and Maria, a saintly figure to the workers, to overcome the vast gulf separating the classes in their city and bring the workers together with Joh Fredersen, the city master. The film's message is encompassed in the final inter-title: "The Mediator Between the Head and the Hands Must Be the Heart".
Metropolis met a mixed reception upon release. Critics found it visually beautiful and powerful – the film's art direction by Otto Hunte, Erich Kettelhut, and Karl Vollbrecht draws influence from opera, Bauhaus, Cubist, and Futurist design, along with touches of the Gothic in the scenes in the catacombs, the cathedral and Rotwang's house – and lauded its complex special effects, but accused its story of being naive. H. G. Wells described the film as "silly", and The Encyclopedia of Science Fiction calls the story "trite" and its politics "ludicrously simplistic". Its alleged communist message was also criticized.
The film's long running time also came in for criticism. It was cut substantially after its German premiere. Many attempts have been made since the 1970s to restore the film. In 1984, Italian music producer Giorgio Moroder released a truncated version with a soundtrack by rock artists including Freddie Mercury, Loverboy, and Adam Ant.