East of Berlin by Hannah Moscovitch. When the son of an escaped Nazi war criminal (still alive and living in Paraguay) and the American-born daughter of an Auschwitz survivor meet and fall in love in Berlin, what they choose to reveal to and conceal from one another brings the past crashing down on them. Love, guilt, and recriminations mix in the regional premiere of this gripping theatrical gut-punch from the author of last season’s smash hit BST production of “Sexual Misconduct of the Middle Classes.” Eight performances only, Thursdays through Saturdays at 7:30 p.m. and Sundays at 2 p.m., from May 25 – June 4.