Season 6 | Episode 4 | Aired 10/8/09
Lexie asks Miranda to lie to the transplant board that her dad's been sober a year so he'll qualify, but Miranda flat-out refuses, so Lexie pulls Meredith's files and finds she is a blood-match. "I know he's not your dad. But you have his blood and I don't, so please, give me my dad." she begs. When Thatcher learns Meredith is the donor, he won't accept it. "I won't let you put me back together," he insists. "I put you through enough."
We're proud of Meredith for not listening to him. "You're not my father," she tells him. "If you die, it probably won't change my life that much. But if you did, it will break Lexie." And Lexie, her dad and we pretty much dissolve into tears. And we might get a little weepy when Miranda tells Meredith, who's just been put under, "I had five interns. Four of you have been on this table. One of you has cancer, one of you died. You better not pull anything funny on me, Grey."