The Dukes of Hazzard will end its two-year run on CMT at the end of the summer after the network airs all 147 episodes of the popular series. On May 28, the show begins its new summer time slot, Monday through Thursday, 8 p.m. to 10 p.m., ET/PT. ... In related news, CMT DukesFest will be held June 2-3 in Nashville with appearances from John Schneider, Catherine Bach and other Dukes cast members. CMT Top Twenty Countdown will film a special episode on location, which will air on June 7.