10 Longest-running TV Shows


Bonanza (1959-1973)

Photo by NBC Television/Getty Images

Airing for 430 episodes, this Western was set in the mid-1800s on a Nevada ranch called "The Ponderosa." The show revolved around the life of Ben Cartwright and his sons, Adam, Hoss, and Little Joe (played by Michael Landon). Bonanza was the first series to tape all of its shows in color, and it held the number one spot on the Nielsen ratings chart from 1964 to 1967.