When Mike Judge created the cult TV show "King of the Hill", it was a cartoon sitcom unlike anything that had come before. It followed the everyday lives of propane salesman Hank Hill and the rest of his crazy family in Arlen, Texas and was renowned for its blending of political correctness and humor. But while the show had its unique brand of dry comedy, there was always an unresolved mystery throughout the series regarding the striking resemblance between Hank's son, Bobby, and their lovable neighbor, Bill.