The cast and crew of “Murder at the Lone Elm” get ready for their opening performance New Year’s Eve. At top, standing, from left are actors Terry Beery, Cassandra Bowman, Shashi Charles, Matthew Waller, Spook Kellum, Aaron Waller, Joey Robinson (stage manager), Trish Ebberts (assistant director), Teresa Bradford and Alex L’Esperance. At bottom, kneeling or sitting, from left are Miles Ledoux (writer and director), Megan Pimentel, Gwen Lewis and John Gustafson (producer). “Murder at the Lone Elm” is an interactive murder mystery, in which the audience is invited to help figure out whodunit. The show opens Dec. 31 at the Performing Arts Center 1670 Nectar Street. Doors will open at 7 p.m. with service of ice cream and toppings, with the show starting promptly at 7:30 pm.