Bonanza was not only the longest-running TV western on NBC, but it was also the second longest-running western on U.S television, trailing right behind Gunsmoke. After 431 episodes, the series ...

Lorne Greene, Pernell Roberts, Dan Blocker and Michael Landon as Ben, Adam, Hoss, and Joe Cartwright, riding horses and looking at the sky in Bonanza. Image via NBC When it comes to classic television ...