The TV show Bonanza ran from 1959 to 1973. Its distinctive theme song was always an instrumental on TV, but various versions with lyrics have been recorded. Before the show premiered, a version was sung by cast members Lorne Greene, Michael Landon, and Dan Blocker, but was never used for broadcast. In 1964, Lorne Green wrote his own lyrics and recorded the version above as a B-side for another song. -via Boing Boing