Bonanza

Bonanza was an American Western television series that ran on NBC from September 12, 1959, to January 16, 1973. It ran for 14 seasons and 431 episodes. "Bonanza" is NBC's longest-running western, and ranks overall as the second-longest-running western series on U.S. network television (behind CBS's "Gunsmoke"). It starred Lorne Greene, Pernell Roberts, Dan Blocker and Michael Landon.