That one episode in season 5 where Tony meets his dad's old girlfriend. She just doesn't shut up. Hand she's pretty boring, too.

Christopher was kind of bad, too. I think it was the first episode I ever watched. The 3 things that bugged me about that episode was:

-How does Silvio (and everyone else) simply forget about the parade? It's all they've been talking about.
-Tony's speech at the end was overkill (although the "Gary Cooper was gay?" and "He died. Oh you mean cause he fought all those Indians" lines were hilarious).
-Iron Eyes Cody. The episode makes it seem like a big revelation that he wasn't a really a Native American. This has been well known for a long time. But then the show changes it up and says he IS Native American.