The original Scooby-Doo only ran for around 24 episodes. When you’re a young child, you either don’t notice as much or just don’t care that you’ve seen the episode before.I just found out something interesting. One of my favorite cartoons when I was a kid was Johnny Quest. I found out that it only ran for one season and there were only 26 episodes made (it was originally a prime time tv show in 1964 and then dumped into syndication on saturday mornings). I watched Johnny Quest every Saturday morning so I must have seen those 26 episodes several times each. Also, the voice of Johnny Quest was Tim Matheson. Tim Matheson was 16 or 17 when he did the voice.