He was a regular cast member from the first season (1959) until the end of the show's run in 1973.
Here are some other projects he has been in:
Television:
* "Bonanza" (1959-1973) - Little Joe Cartwright
* "The Red Skelton Hour" (1963)
* "The Andy Griffith Show" (1967)
* "The Virginian" (1966)
* "The Wild Wild West" (1967)
* "Gunsmoke" (1969)
* "The Love Boat" (1980)
* "Fantasy Island" (1980)
* "The Newhart Show" (1983)
* "Walker, Texas Ranger" (1995)
Movies:
* "The Big Show" (1961)
* "Bonanza: The Movie" (1988)
Other:
* "The Adventures of Wild Bill Hickok" (TV series, 1951-1952) - appeared as a child actor in one episode.
He also did voice work for the animated television show "The Flintstones".
It's worth noting that Darby Hinton's career primarily revolved around his role in "Bonanza". He continued to work in the industry after the show ended, but never achieved the same level of fame.