Bonanza is an American western television series developed and produced by David Dortort and broadcast in the United States for 14 seasons on the NBC network.
[3] Bonanza also became a worldwide success as it was broadcast in nearly 50 countries, including Canada, Brazil, Yugoslavia, the United Kingdom, France, Italy, Switzerland, Saudi Arabia, Thailand, Australia, and Japan.
In 1964, Pernell Roberts began expressing a desire to leave the series, and so prospective replacements were introduced via Barry Coe as Little Joe's wayward maternal half-brother Clay, and Guy Williams as Ben's nephew Will Cartwright.
In the twelfth season, Mitch Vogel joined the cast as Jamie Hunter, a teenage orphan who is adopted by Ben Cartwright.
From 1964 to 1967, Bonanza became the most watched show in the U.S. All 14 seasons have been released on DVD in Region 1, both individually, and as a complete series box set.