Ethan Reigns
Scooby
One show that I thought would be a "one and done" was Buffy the Vampire Slayer. I watched from the beginning and found that the show was more intelligently written than anything else on TV at the time, so I continued watching, but if you were around just before it aired, I'm sure you had your apprehensions about how good a show it was going to be. The premise of a high school girl having the usual high school girl troubles plus having to fight monsters seemed silly or infantile at the time, but what we got was an excellent show with good writing, attractive characters and an absorbing plot line that made us continue to watch.