‘STARMITES.’ Performed by PCS Youth Theater. Friday and Saturday at 7:30 p.m. Cast of 50 performers, ages 8 to 15, from Bristol, Farmington, New Britain, Plainville, and Southington. “Starmites” is a musical sci-fi adventure. Plainville High School auditorium, Robert Holcomb Way, Plainville. $15. Tickets available from any cast member.