Years ago, I saw a documentary on Jonny Quest. He is actually a renaming of a character of an old radio show from 1933 to 1951: "Jack Armstrong:The All-American Boy". To listen to one of these shows there are differences, but a WHOLE lot of similarities.
When the rights to Jack Armstrong couldn't be obtained, the name of the character was going to be "Chip Ballou" and the show "The Saga of Chip Ballou".
If you think the show was full of drama.......it sounded like behind the scenes was even worse!
Jonny Quest is beyond classic and while it was modernized and ressurrected with some success about twenty years back, the original was one of the works that cannot be topped....even with live action.
Hanna Barbera had a lot of prime time cartoons that weren't really designed for kids (Flintstones, etc.) and these would never get looked at by a network in these politically correct and sensitive days. But the original Jonny Quest IMHO can never be topped.