Comtra Theatre, Route 19 in Cranberry Township, presents “Monty Python’s Spamalot” Friday through Nov. 9. Show time is 7:30 p.m. Tickets are $15. For reservations, call 724-591-8727 or go online at comtraplayers.com.

REGIONNew Castle Playhouse, 212 E. Long Ave., New Castle, presents the musical “Tick, Tick ... Boom!” Friday through Nov. 3. Show times are 7:30 p.m. Fridays and Saturdays and 2 p.m. Sundays. Tickets are $12. Call 724-654-3437.

PITTSBURGHHillman Performing Arts Series presents Nelson Illusions Smoke & Mystery Tour at 7:30 p.m. Saturday at the Hillman Center for Performing Arts on the Shady Side Academy Senior School campus, 423 Fox Chapel Road.Tickets are $25 for adults, $20 for senior citizens and $10 for students and are available by calling 412-968-3040 or visiting www.thehillman.org.Pittsburgh Public Theater’s Masterpiece season begins with “Our Town” running through Oct. 27 at the O’Reilly Theater, 621 Penn Ave. For tickets, call 412-316-1600 or visit ppt.org.