Comtra Theatre, Route 19 in Cranberry Township, presents “Three Murders and It's Only Monday” through Saturday. Curtain is at 7:30 p.m. Friday and Saturday. Tickets are $12. Reservations can be made at 724-773-9896.

<B>Kean Theatre</B>, 5847 Meridian Road, Gibsonia, presents another installment in its murder mystery dinner series “April Fool's Day Massacre” at 7 p.m. Friday and Saturday at the Mount Vernon Restaurant adjacent to the Kean Theatre. Tickets for the dinner and show are $33, available by calling 724-444-5326 or by visiting www.keantheatre.com.

<B>REP, Point Park University’s professional theatre company</B>, presents the Pittsburgh premiere of “Mercy and the Firefly,” from Friday through April 17 at the Pittsburgh Playhouse’s Studio Theater, 222 Craft Ave. Performances will be at 8 p.m. Thursdays through Saturdays and at 2 p.m. Sundays. Tickets range from $24 to $27 and are available by calling 412-392-8000.<B>“Nunsense,”</B> the musical about the Little Sisters of Hoboken, is being staged through April 17 at the CLO Cabaret Theater, 655 Penn Ave. Shows are at 7:30 p.m. Wednesdays through Saturdays and at 2 p.m. Saturdays and Sundays. Tickets start at $34.75 and are available by calling 412-456-6666 or visiting www.CLOCabaret.com.<B>Quantum Theatre,</B> a local experimental theatre company, continues its 20th season with “Maria De Buenos Aires” by Astor Piazzolla, a poetic, musical story of a woman and the tango, through April 17 at the YMCA at 120 S. Whitfield St. in East Liberty. Curtain is at 8 p.m. Wednesdays through Saturdays and at 7 p.m. Sundays. Tickets range from $30 to $45 with a limited number of $16 student tickets available. Call 888-718-4253 or visit www.quantumtheatre.com.