The Performing Arts Series at Butler County Community College concludes with a show by "Chapter 6," a musical summary of "The Wizard of Oz" performed a cappella in close harmonies and rhythmic vocal sounds, at 8 p.m. Saturday in the Succop Theater on campus. Single tickets cost $15 in advance and $17 at the door; students pay $10. Box office hours are 10 a.m. to 2 p.m. Mondays through Thursdays and 10 a.m. to noon Fridays. Call 724-284-8505.