Tom Atkins as Scrooge, Daniel Krell as the ghost of Marley, and Jeff Howell as Bob Cratchit play in CLO's "A Musical Christmas Carol" through Dec. 23 at the Byham Theater, 101 Sixth St., Pittsburgh. The 18th annual holiday production goes on stage at 7:30 p.m. Thursdays and Fridays plus a few other weekdays, at 4 and 8 p.m. Saturdays, and at 2 and 6 p.m. most Sundays. Tickets range from $26.50 to $44.50 with half-priced tickets for children ages 3 to 14. Call 412-456-6666 or visit the Web site, www.pittsburghCLO.org.