Derek (about Sadie): So she's your pre-Cristina, Cristina. You gonna tell me why she calls you 'death'?
Meredith: Oh, no. The adventures of 'death and die' are better left untold.
Cristina (walking by): Hey, pedia is scratching her little chicken arms, still no word on why McH hitched it with her flying little monkeys. Later.
Derek: Translate that for me.
Meredith: Lexie may be a secret cutter and there's still no word on why Hahn quit.
Derek: Is that true about Lexie?
Meredith: I don't know. How would I know?
Derek: If it is true, what are you gonna do about it?
Derek: Meredith, you can't do nothing. She's your sister.
Derek: And your family.
Meredith: I'm not understanding.
Derek: Lexie's your family. (Meredith just stares at him blankly) Forget it.