If you’ve been thinking of catching a performance of The Mousetrap at Great Lakes Theater, tonight might be a good time to, um, pull the trigger. That’s because this evening’s playbill includes not only a performance of the iconic Agatha Christie murder mystery, but also a pre-show conversation with Cleveland’s favorite hometown mystery writer, Les Roberts. The award-winning author is particularly popular hereabouts for his 14 mystery novels featuring Milan Jacovich, a Slovenian P.I.; with titles like The Cleveland Creep, Pepper Pike, and Whiskey Island, you can guess the setting. (We hear his newest work-in-progress samples life at Northfield Park.) Roberts’ talk begins at 6; the stage production starts at 7:30. Tickets for both range from $20 to $50 and can be had by phone or online. It all happens in the Hanna Theatre on Playhouse Square.