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Former lawman Troy Carver (Wilton Graff), an old friend of Marshal Matt Dillon (James Arness), arrives in Dodge with a travelling sideshow, where Troy is making a living showing off his sharpshooting skills. Lee Polen (Martin Kingsley), a farmer with long-standing grudge against Carver, also shows up in town intent upon killing the old man. Though Matt is aware that Carver is going blind, the aging gunman defiantly insists upon handling Polen himself--thus setting the stage for a surprising, and ironic, finale. This episode is based on the Gunsmoke radio broadcast of July 18, 1955.