I'm a big fan of parallels, coming full circle and all that jazz, so like Proud in 101 and 513, I am partial to Sleep by The Dandy Warhols for the same reason. (I think it's actually in 102, but many of us see 101 and 102 as one.) I like that nod to the past, an acknowledgement of sorts, reminding us just how far the characters have come since the beginning. That sounds kind of cheesy when I type it out, but that's why I like it.