Our Town (Barrow Street Theatre, 27 Barrow St.). Stephen Kunken is now playing the Stage Manager in what has become the longest-running commercial production of Thornton Wilder’s masterpiece ever to be mounted. Alas, it can’t run forever, so if you have yet to see the best show in New York, get cracking. David Cromer’s staging is a re-creative landmark, at once arrestingly original and fundamentally faithful in its approach to the author’s well-loved text. Don’t listen if anybody tries to tell you about the surprise ending–and once you’ve seen the show, don’t tell anybody what happens (TT).