When Weaver left the show to take on new career opportunities, there was an open slot ready to be filled in. Dillon needed someone by his side, which was a call actor Ken Curtis was ready to answer. But rather than recasting the Chester character, "Gunsmoke" instead opted to expand upon Festus Haggen, a character that appeared as a one-off guest appearance in season 8 ("Us Haggens").
Unlike Chester, Festus would actually be endowed with the duties of a deputy, and ultimately stick around until the series finale in 1975. In addition to serving as a legitimate aide to Dillon, the hillbilly turned aide of the law was also propped up as a comedic relief character whose cantankerous, yet kind personality made him a reliable source for laughs. One of his most recognizable trademarks, however, would be that of the infamous scruff that he'd always be scratching. As it turns out, Curtis would have to keep his bristle in order to play Festus.