Bonanza, season 4

The fourth season of the American Western television series Bonanza premiered on NBC on September 23, 1962, with the final episode airing May 26, 1963. The series was developed and produced by David Dortort, and season four starred Lorne Greene, Pernell Roberts, Dan Blocker, and Michael Landon. The season consisted of 34 episodes of a series total 431 hour-long episodes, the entirety of which was produced in color. Season four was aired on Sundays at 9:00 p.m. It ranked #4 in the Nielsen ratings, the highest rated Western for the 1962–1963 season.