Written with honesty, curiosity and humor by Hélène Cixous, “Oy” follows sisters Selma and Jenny as they return home to Paris after a trip to their German hometown to testify about the horrors they endured during the Holocaust. Based on the experiences of the playwright’s family members, the piece works to untangle the memories and emotions of a shared journey. Sat. 8 p.m. Through Oct. 20. $34.99 (general), $30 (students, seniors). The Actors’ Gang, 9070 Venice Blvd., Culver City. (310) 838-4264. theactorsgang.com.