This working title for the episode was "Love/Robins".

Meredith: (opening voiceover) In the hospital, we see addiction every day. It's shocking how many kinds of addiction exist. It would be too easy if it were just drugs and booze and cigarettes. I think the hardest part of kicking a habit is wanting to kick it. I mean, we get addicted for a reason, right? Often, too often, things that start out as just a normal part of your life at some point cross the line to obsessive, compulsive, out of control. It's the high we're chasing, the high that makes everything else fade away.

Bailey: Would you look at the residents, big snazzy residents, standing around playing with housewares.
Cristina: Turn a blind eye and the soup tureen's yours.

Meredith: We agreed, S and M only.
Derek: S and M?
Meredith: Sex and mockery.

Meredith: Hey, what's the 911?
Cristina: Mama is here.
Meredith: Your mother?
Cristina: No, not my mother. Mama. Mama is here.
Meredith: Oh, Burke's mother.
Cristina: Yeah, make the synapses fire a little more quickly, Meredith.

Webber: What do we have?
Callie: Gas main blew in an apartment building, five injured, some badly.
Cristina: Excellent! (Callie and Webber both get a look) Horrible, horrible ... sad.

Cristina: Carnage in the pit. My day is improving. (Cristina walks away begins to walk away; the interns stand still) Follow!
Lexie: We're not gonna round?
Cristina: Carnage trumps rounds. Three, write that down. Carnage always trumps rounds.

Meredith: (closing voiceover) The thing about addiction is it never ends well, because eventually, whatever it is that was getting us high stops feeling good and starts to hurt. Still, they say you don’t kick the habit until you hit rock bottom, but how do you know when you’re there? Because no matter how badly a thing is hurting us, sometimes letting it go hurts even worse.

Episode Title: Love/Addiction

"Love/Addiction" is the title of a song by Morris Day.