BONANZA 1959 Cast THEN AND NOW 2023, All the cast members died tragically!!<br />Bonanza is an American Western television series that ran on NBC from September 13, 1959, to January 16, 1973. Lasting 14 seasons and 432 episodes, Bonanza is NBC's longest-running western, the second-longest-running western series on U.S. network television (behind CBS's Gunsmoke), and one of the longest-running, live-action American series. The show continues to air in syndication.
