This overview of the sitcom “The Beverly Hillbillies” offers the behind-the-scenes story of its creation and its run from 1962 to '71. Among the topics covered: the unhappiness of Max Baer Jr. (who played Jethro) with creator Paul Henning; the disparity in pay between star Buddy Ebsen (Jed) and the rest of the cast; the show's surprising cancellation; and cast members' post-show careers. Interviewees include Baer Jr., Donna Douglas, Lily Tomlin, Dabney Coleman and Henning's wife, Ruth.