Roberts was the only accomplished singer of the original cast, though David Canary, who joined Bonanza in 1967, had a background in voice and performed on Broadway.

Did Pernell Roberts regret leaving bonanza?

That job was very unpleasant, and I never regretted leaving.” Roberts also didn't enjoy his character, who was in his 30s, to always seek approval and direction from his father and called this part of the storyline “silly.” ... Roberts left the show after 202 episodes and was written out by saying he moved away.

Why did Pernell Roberts really leave bonanza?

According to the 1973 book "Marilyn Beck's Hollywood", when Pernell Roberts told Lorne Greene he was leaving the series because he wanted to challenge himself as an actor, Greene told him to stick to it, because he would be so rich by the end of the run he could hire Tennessee Williams himself to write a play for him.