The definitive 2002 version of German filmmaker Fritz Lang’s 1927 silent sci-fi classic originally screened in 35mm film with subtitles. The movie focuses on the class divide between the rich inhabitants of an aboveground city and the underground laborers that power its massive infrastructure. A forward-thinking robot decides to start a revolt, and conflict ensues. The 2010 restoration of the film screens tonight at 7 at the Cleveland Institute of Art Cinematheque. Boston's Alloy Orchestra will play the score. Tomorrow night, the Alloy Orchestra returns to the Cinematheque to accompany Gallery of Monsters, the recently unearthed and restored silent melodrama produced (and perhaps co-directed) by visionary French filmmaker Marcel L’Herbier (L’Inhumaine). Tickets cost $20, $15 for Cinematheque members and students. (Niesel)