Ratings: 16.4 million viewers, #1 in its timeslot

This episode was accidentally aired in Canada on CTV on on September 21 in place of "Time Has Come Today".

Addison: I need the day off.
Richard: A day off? For what?
Addison: For drinking. I am feeling the need to do some drinking. Actually, I’m feeling the need to do some crying, but my tear ducts seem to be too proud, so I am going to do some drinking instead.
Richard: What, no laboring moms today?
Addison: No … because I think God knows that I need to do some drinking today.
Richard: Do you want to talk about it Addy, or do you want to be glib a little bit longer?
Addison: Why are you living in your office?
Richard: Marriage is … hard.
Addison: Well, thank goodness. Mine seems to be just about over.

Cristina: His mother rivals my mother and that's saying something. Both of them, dark and evil.
Meredith: I'm miss dirty stripper Cristina. She was fun -- a lot less angry.
Cristina: Next time she even looks at me sideways, I’m telling her what I think. She wants to call me a racist. Yeah, okay? I’ll call her a sexist. Change my career after I’m married. What is this, 1953? If she comes at me, I’m going there.
Meredith: I think you should. I think we should all just go there. You know, tell the truth, spit it out, go with your gut, follow your instincts.
Cristina: I miss philandering whore, Meredith. She was trashy and much less idyllic.

Callie: The panties?
George: Yeah?
Callie: Not mine. The jealousy?
George: Yeah?
Callie: Insanely hot.

Cristina: I told you to guard the door!
Nurse Tyler: I had a code blue.
Cristina: I had parents walk in.
Nurse Tyler: We saved the guy’s life.
Cristina: Whatever, I want my 20 bucks back.
Nurse Tyler: Sorry, I bought everyone coffee to celebrate saving the guy’s life.

(in the stairwell)
Derek: Well, this is a change from the elevator. A little bit more public I like that.
Meredith: You're married. You're married and you said things to me.
Derek: Yes, I said things to you
Meredith: Normally, I would like the things you said to me. Normally, I would even think the bulletin board thing was funny.
Derek: Bulletin board thing? What are you talking about?
Meredith: But you're married. Which makes none of this normal. It makes me a home wrecker and I hate the fact that I'm a home wrecker.
Derek: Meredith. I'm not going to pressure you. Take all the time you need. Just so you have all the information. But my home was wrecked way before you came into the picture. I am just now done trying to rebuild it.
Meredith: You're done.
Derek: I'm done, whatever you decide. I'm ending it with Addison … today.
Meredith: You have said this before.
Derek: I know but this time I mean it. I'm going to come clean just as soon as I see her.
Meredith: You are?
Derek: I am.

Derek: It’s not an affair. I was gonna tell her, Addison, I was gonna tell her today.
Richard: Give her some space, give her some time.
Derek: No. That’s not it. No. I gotta tell her today. When something’s over, it’s just gotta be over. Meredith she’s ... she’s not an affair.

(after Meredith tells them she's going to date both men)
Finn: You bowing out?
Derek: No, you?
Finn: I don’t think so.

Bailey: O’Malley, Yang, prep your patients for surgery. Karev pit, Grey charts. All four of you do not make me regret setting you loose in this hospital. O’Malley, what do I mean by that?
George: You mean check with you before we cut any wires or steal any hearts.

Meredith: (to Cristina) It's not Tyler's fault you're a dirty dirty stripper.

While George is trying to talk Dana out of leaving the hospital, she opens her bags and starts putting her things into it. In the next scene, she opens the empty bag again and once again starts packing.

Episode Title: I Am a Tree

The episode title refers to a song of the same name by Guided by Voices written by Doug Gillard.