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Bonanza is an American Western television series that ran on NBC from September 12, 1959, to January 16, 1973. Lasting 14 seasons and 431 episodes, Bonanza is NBC's longest-running Western, the second-longest-running Western series on American network television (behind CBS's Gunsmoke), and one of the longest-running, live-action American series. The show continues to air in syndication.

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