"Parker Lewis" was a very unusual show, and that's probably also the reason why it only lasted 3 seasons. The show revolves around the life of the main character Parker (the trendy guy), and his pals, Mikey (the cool guy), Jerry (the nerdy guy) and later on also Kubiac (the bully guy, who turned out to be all right).
It's all about being a teenager, and all what comes with it, love, trouble with the parents, making choices etc. What makes the show unique is the stories, and more importantly how they are told. It's hard to explain really, but it's something out of the ordinary, and it definately worth checking out.
Even though the show didn't last very long, it did help make the way for other brilliant children/young adult shows such as "Eerie Indiana" and "The Adventures of Pete and Pete".