Metropolis (Madacy Ent. 1926)

Fritz Lang's most famous silent film uses science fiction and spectacular special effects to tell a story of biting social criticism.In a futuristic time and place, an above ground city of lightness, culture and respectability is kept going only by the enslaved proletariat laboring beneath in the underground city: a nightmarish, cruel, and dark place.
An innovative and influential film in its day and now considered one of the hippest films of the sci-fi genre.