William Edgar Buchanan II was an American actor with a long career in both film and television. He is most familiar today as Uncle Joe Carson from the Petticoat Junction, Green Acres, and The Beverly Hillbillies television sitcoms of the 1960s.

Petticoat Junction is an American television sitcom that originally aired on CBS from September 1963 to April 1970. The series takes place at the Shady Rest Hotel, which is run by Kate Bradley; her three daughters Billie Jo, Bobbie Jo, and Betty Jo; and her uncle Joe Carson. The series is one of three interrelated shows about rural characters produced by Paul Henning. Petticoat Junction was created upon the success of Henning's previous rural/urban-themed sitcom The Beverly Hillbillies (1962–1971). The success of Petticoat Junction led to a spin-off, Green Acres (1965–1971). Petticoat Junction was produced by Filmways, Inc.