In 1967, after 12 years on the air, Gunsmoke was slated to be cancelled. Ratings had been dropping for some time and CBS programmers were set on shutting the program down.
It didn’t happen. CBS President Bill Paley and his wife were big fans of the show and he overruled management. Instead, Paley shut down Gilligan’s Island and moved Gunsmoke from Saturday to Monday. Viewership went back up and the show continued for another eight years. Its 20 years of production was a TV program record until The Simpsons recently beat it.