(2 hrs., 30 mins.) Riffing on some of Anton Chekov’s most time-tested themes, Christopher Durang proves in his hysterically funny and surprisingly affecting new romp that whether you’re in 19th-century Russia or 21st-century Pennsylvania, the human condition never changes. Vanya (David Hyde Pierce) and Sonia (Kristine Nielsen) have never left their childhood home – a Bucks County farmhouse – having watched the glamorous exploits of their movie star sister, Masha (Sigourney Weaver), from afar. A surprise visit from Masha and her 20-something boy toy Spike throws the quiet household into upheaval as everyone gets swept up in lust, rivalry, regret, and the sudden possibility of escape. Tues. & Thurs., 7; Wed., Fri. & Sat., 8; Wed. & Sat., 2; Sun., 3. Call or visit website for variations in playing schedule.