Saxonburg native Allison Cahill will appear as Mrs. Fezziwig and Mrs. Dilber in her return to Pittsburgh CLO’s “A Musical Christmas Carol,” her fifth season with the show. The 28th annual production of “A Musical Christmas Carol” goes on through Dec. 22 at the Byham Theater, 101 Sixth St. Tickets are available by calling 412-456-6666 or visiting pittsburghCLO.org.

“Amahl & the Night Visitors” from Resonance Works features Christopher Scott, an assistant professor of music at Slippery Rock University, as King Melchior on the stage at the New Hazlett Theater on the North Side. The show goes on at 7:30 p.m. Dec. 20 and at 3 p.m. Dec. 22. The family-friendly program runs 90 minutes. Visit www.resworks.org/tickets or call 412-501-3330.