Bonanza premiered on NBC, marking the beginning of one of the longest-running and most popular Western television series.
Pernell Roberts left the show after expressing dissatisfaction with the show’s direction, marking a significant change in the cast.
Dan Blocker, who played Hoss Cartwright, passed away due to a pulmonary embolism, leading to major changes in the show's direction.
Bonanza aired its final episode after 14 seasons and over 430 episodes, concluding its long and successful run.