Charmed Again part one is the one that gets to me. I think it because that's when we know that Prue is really gone. Holly does such a wonderful job and it really shows us that Piper and Prue weren't just sisters but best friends. And the fourth epi i think it's called Hell Hath No Fury, when Piper becomes a Fury is another one that is emotional for me. And then about half way through season four I quit watching it. I should probably try it again. I did see most of the last two seasons, and weren't too bad. But I still missed Prue.