Metropolis is widely considered to be one of the greatest films ever made, telling the tale of class warfare and uprising in a dystopic society that has been spurred by an cyborg fashioned in the likeness of an aristocrat’s dead wife. But the version the vast majority of us had seen was not the original cut that German director Fritz Lang had submitted to studios; rather it was a considerably shortened version that had been slowly restored — but never completed — over the years. Then in 2008, a discovery was made.