Comtra Theatre, Route 19 in Cranberry Township, is presenting "The Hollow," a drama, through Nov. 7. Curtain is at 7:30 p.m. Fridays and Saturdays. Admission is $12 for plays and $15 for musicals. Box office opens at 6:45 p.m. the day of the show. Call 724-773-9896.

<B>Halloween @ the Hazlett </B>will feature Dias de los Muertos presented Friday by the New Hazlett Theater, Allegheny Square East. The fundraiser is a modern take on the sacred holidays of Days of the Dead. A VIP Fiesta will be from 8 to 10 p.m. and includes admission to the All Souls Party, which will be from 10 p.m. to 2 a.m.<B> </B>Admission to the VIP Fiesta is $75 in advance or $100 at the door. Admission to the All Souls Party is $25 in advance or $35 at the door. Free parking is available at the Pittsburgh Children's Museum. Call 412-320-4610.<B>Pittsburgh Public Theater</B> opens its 35th season with "Ella," the hit bio-musical about Ella Fitzgerald, known as The First Lady of Song. "Ella," which includes 23 legendary hits, runs through Sunday at the O'Reilly Theater, 621 Penn Ave. The show goes on at 8 p.m. through Saturday and at 2 p.m. Saturday and Sunday. Tickets range from $40 to $60; students and those age 26 and younger pay $15. For tickets call 412-316-1600 or visit www.ppt.org.<B>CLO Cabaret</B> is showing "Forever Plaid" through March 28, 2010, at the CLO Cabaret at Theater Square, 655 Penn Ave. "The Plaids" is the story of a 1950s all-male singing group. Tickets are $39.50 for Wednesday, Thursday and Friday evenings, $44.50 for Saturday evenings, and $34.50 for matinees. Call 412-456-6666.

<B>New Castle Playhouse</B>, 212 E. Long Ave. in New Castle, is staging "I Love You, You're Perfect, Now Change" through Sunday. Shows starts at 7:30 p.m. Friday and Saturday and at 2 p.m. Sunday. Tickets are $10. Call 724-654-3437 or visit www.newcastleplayhouse.org.