2010 saw the release of a restored version of Metropolis, the classic German expressionist, sci-fi film directed by Fritz Lang. The restoration started two years earlier, in 2008, when a long sought-after copy of the 1927 film was found in the archives of the Museo del Cine in Buenos Aires, and it contained 30 minutes of previously unseen footage. (Get the backstory here.) German experts got to work and fully restored the extended but degraded copy. Then came the big unveiling. In February 2010, the new Metropolis was screened at The Berlin International Film Festival, and ARTE presented a live broadcast. The trailer for the film appears above; and the film, as presented by ARTE, now lives on YouTube.
Older versions of Metropolis -- the ones you know so well -- are listed in our collection of 420 Free Movies Online. Scroll to the bottom of the page and look under "Silent Films."
P.S. A rock opera version of Metropolis will be coming to a theater near you. More on that here.