This is your final week to catch performances of the comedy-driven and improv-oriented Sister's Christmas Catechism at Booth Playhouse. Mary Zentmeyer, who starred in previous performances of Late Nite Catechism, is back with more twisted Sister action and pure wit, as she questions and relays her thoughts on a holiday mystery -- what happened to the Magi's gold? Audience members become Sister's "class," and some may even become a greater part of the show, as Sister is always welcoming volunteers to a spot on the center stage and publicly punishing loud mouths. $24.50 and up. Dec. 17, 7:30 p.m.; Dec. 18-19, 8 p.m.; Dec. 20, 3 p.m. Booth Playhouse, 130 N. Tryon St. 704-372-1000. www.blumenthalcenter.org.