Retro film buffs and historians will want to take note of this month's Cinematheque, Marathon Branch's free weekly movie series. The theme is "Silent Scream," a tribute to silent movies and classic horror flicks. On April 11 at 6 p.m., the selection is the silent-era film "Metropolis." The movies are all shown on the large screen in the community room, and freshly popped popcorn will be served (for free!).