DCist’s highly subjective and hardly comprehensive guide to the most interesting movies playing around town in the coming week. Repertory: The Third Man The AFI continues to please with yet another showing of an absolute must-see classic. Last week it was The 400 Blows, and this week it’s three showings of Carol Reed’s gripping British noir, The Third Man. Based on a story and a screenplay by Graham Greene, the movie is a study in…