Meredith: (opening voiceover) Doctors live in a world of constant progress and forward motion. Stand still for a second, and you'll be left behind. But as hard as we try to move forward, the past always comes back to bite us in the ass. And as history shows us again and again, those who forget the past are doomed to repeat it.
Cristina: Why are you defending her? She went to state school.
Alex: So did I.
Cristina: Well, she's skinny and blonde.
Alex: So's Mer.
Cristina: Well, she's annoying.
Alex: So are you.
Cristina: Teddy Altman. I ... I've never heard of you.
Teddy: Cristina Yang. I've never heard of you either. So I guess that makes us even.
Meredith: (closing voiceover) Sometimes the past is something you just can't let go of. And sometimes the past is something we'll do anything to forget. And sometimes we learn something new about the past ... that changes everything we know about the present.