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Springfield energy tycoon C. Montgomery Burns (voice of Harry Shearer) has never been one to endear himself to his fellow citizens, but his public image sinks even lower than usual after oil is discovered on the grounds of the local elementary school. While Principal Skinner (also voiced by Shearer) plans massive improvements for the school -- including buying a new crystal slop-bucket for Groundskeeper Willie (voice of Dan Castellaneta) and hiring Latin jazz great Tito Puente as a music teacher -- Burns instead finds a way to tap into the oil well, adding to his already bulging bankroll and forcing massive cutbacks for the school. The after-effects of Burns' actions prove to be widespread -- the local retirement home collapses, leaving Grampa Simpson (also voiced by Castellaneta) with nowhere to go, while Moe (voice of Hank Azaria) is forced to close his tavern due to toxic fumes, and Bart (voice of Nancy Cartwright) is angry after his dog is injured by a blast of crude oil. Meanwhile, Homer (also voiced by Castellaneta) begins to snap when Burns is unable to remember his name, and the few citizens not already furious with Burns are out for his blood when he constructs a giant shield that prevents the sun from shining on Springfield. When Mr. Burns is shot after a town meeting, the question isn't "Who would want to kill the richest man in town?" but "Who wouldn't?" "Who Shot Mr. Burns (Part One)," the cliffhanging finale of the sixth season of The Simpsons, first aired on May 21, 1995.