Add Yahoo as a preferred source to see more of our stories on Google. While the actor’s career took off with his role as Little Joe Cartwright on Bonanza, Landon had been acting since the mid-1950s.

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 ...