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Owen recruits a new cardiothoracic surgeon, Iraqi War vet Dr. Teddy Altman, but Cristina is quick to judge her abilities in the O.R. Meanwhile, Izzie returns to Seattle Grace with her former high school teacher who is suffering from dementia; and the Chief begins to feel the strain of his new responsibilities post-merger.
Ratings: 14.87 Million Viewers
Trivia: Izzie lives in the middle-sized town of Chehalis, Washington which is exactly halfway between Seattle, Washington and Portland, Oregon.
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.
Richard (waking up): What've we got?
Bailey: An emergency chole, a new cardio attending and your wife is here to see you.
Bailey: You in trouble. Drink your latte.
Christina: Thank you for my present. And I'll try to get over birds on the scrub cap.
Owen: Teddy's best friend, she was this bird person she loved birds. And um... She died in the second tower. And that's why Teddy gave up her attending position at Columbia and she joined the Army. I told you she'd surprise you.
Cristina: Thank you.
Meredith: How'd you find me here?
Derek: The nurses love me. They're my spies. And they're pissed that you're desterilizing their equipment.
Meredith: What else was I supposed to do? I haven't been able to get on a surgery all day. Before I left there were 5 people to compete with, now there 25.
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.
When Izzie shows up at the hospital with her high school teacher, Meredith asks her is she is pregnant. Izzie had her eggs frozen before her cancer treatment and therefore cannot have childern, Meredith should know this.
Episode Title: New History
"New History" is the title of a song by Verbow.
Private Benjamin: Christina refers to Dr. Altman as "Private Benjamin". Private Benjamin is a 1980 Goldie Hawn film about a high society woman who joins the Army on a whim.