Comtra Theatre, Route 19 in Cranberry Township, is presenting the comedy/thriller "Postmortem" through Saturday. 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>"My Way: A Musical Tribute to Frank Sinatra" </B>continues through May 10 at the Cabaret at Theater Square, 655 Penn Ave. "Fly Me to the Moon," "It Was a Very Good Year," "The Lady Is a Tramp," and, of course, "My Way," are among the 56-song revue that will played that evening. Performances will be at 7:30 p.m. Wednesdays, 1 and 7:30 p.m. Thursdays, 7:30 p.m. Fridays, 2 and 7:30 p.m. Saturdays and 2 p.m. Sundays. Tickets are $39.50 for evening shows and $34.50 for matinees. Call 412-456-6666.<B>Pittsburgh Public Theater</B> presents an all-new production of Eugene O'Neill's classic, "A Moon for the Misbegotten," through May 17 at the O'Reilly Theater, 621 Penn Ave. Set on a Connecticut farm, The tale is one of revenge, passion and sorrow but eventually cleansing. Performances are scheduled at 8 p.m. Tuesdays through Saturdays (except May 12 when the show is at 7 p.m.), and at 2 and 7 p.m. Sundays (except May 17 when the only show is at 2 p.m.), with additional 2 p.m. matinees on May 2, 9, 14 and 16. There will be no public performance on April 29. Tickets range from $35 to $55; students and anyone age 26 and younger pay $15.50. Call 412-316-1600 or visit the Web site, www.ppt.org.