This season's ExxonMobil Summer Chills series at the Alley Theatre kicks off with Agatha Christie's The Mousetrap. Ever since it opened on London's West End in 1952, the plot of Christie's classic whodunit has remained one of the theatre world's best-kept secrets, and audiences are requested to keep the identity of the killer locked in their hearts. When an eccentric group of guests find themselves snowbound in a country hotel, murder strikes. Whodunit? The mysterious foreign gentleman? The peculiar young man? The retired major? Or the host and hostess? Alley Artistic Director Gregory Boyd directs. There will be an open-captioned and American Sign Language-interpreted performance on Sunday, July 20 at 2:30 p.m.