Duuuude, the werewolf one!! It was sooooo creepy when I was a kid. I saw that shizzle when I was like eight years old and it scared the bejeezus out of me.
One of my favorite points about the show was seeing how every character was apart of a boy-girl paring of some sort.
Like EVERYONE. If the man character was a boy, he's have a girl best friend or sister or an girl rival. That eventually got crazy after a while, especially in the trick or treating episode with TABITHA and LEE. They were like the seventh girl and boy pairing of that story.