Oh my. This is some 1970 right here. I thought this had to be an April Fool's Joke or something, but it's not. Seventeen episodes produced for ABC Saturday mornings. "Two of the three producer/creators—Stan Burns and Mike Marmer—who had been writers for Get Smart, quit their jobs as head writers on The Carol Burnett Show to work on Lancelot Link, Secret Chimp." [Wikipedia]
If nothing else, watch the opening titles, you won't believe how long they go on ...
Once again, hat tip to Mark D. for bringing this to my attention.