Walk Through The Fire--from Buffy The Vampire Slayer's episode "Once More With Feeling".
It's been a while since we've had a Buffy open thread. It is Amato's favorite show, bar none. But I have to admit my complete cultural ignorance and say that this is the only episode of BtVS I've watched completely through. The writing on this one was enough to make me want more...if only I could wrest control of that remote.