Owen, Richard and Derek

Owen has a patient with a football-sized tumor and a dicey prognosis, and Richard swoops in and wants it. Now Derek steps in and says he'll make the call on what to do after hearing their plans.

Cristina chooses to work with Richard so she can spy for Hunt. But Webber's wise to her game, and dangles complicated procedures in front of her like bait to turn her into a double agent.

Derek picks Hunt's, which is more risky and exploratory than Webber's, and gets an earful, as Webber tells him why he's screwing up on the job because a chief should encourage surgeons to approach problems their way, not the way the chief would.

The patient, a woman who just wants to make it through the month to see her daughter's wedding and has to be convinced to roll the dice on the surgery starts to go south in the OR, and Hunt brings Webber in.

Between them they take care of the tumor, which also includes removing the woman's liver to get at all of it. The patient lives.

Mark, Teddy and Lexie

Mark has come to terms with the fact that he's sad and lonely and wants to date, but just because Callie tells him to get out there and behave like a normal dating adult, it doesn't mean he knows how to.

\Mark buys into the advice, and after Teddy needs him on a consult - a patient who had a lung removed years before now has a syndrome causing his heart to float around inside his body, and she wants to use saline implants to keep it in place - he decides to bite the bullet and ask her out.

Teddy's stunned and says no, but after conferring with her new pal Arizona, who encourages her to have a little fun, she decides to say yes.

Owen witnesses a little of this back-and-forth, and warns Mark that Teddy's not the kind of woman you mess with, because she deserves better than that. When Teddy realizes he wants to have dinner and not just a quickie, she says no.

Mark gets all down about being treated like a piece of meat, even during surgery. Later, Teddy waffles again, and he tells her that they should have lunch, in public, and get to know each other.

Because he wants to build a life and have a family and doesn't want to waste time with someone who doesn't want those things.

So it's on.

But it's not that easy for Lexie, who's been convinced that Mark was just trying to make her jealous. But when Alex confirms that what's going down seems real, she falls apart at the notion that Mark's really moving on without her.

Bailey

Bailey's about to go on her third date with anesthesiologist Ben, and he's cooking dinner for her. Which Callie, when consulted, of course tells her usually means that it's the sex date.

She freaks out but he tells her to have a conversation rather than give a speech, and informed Bailey that unlike everyone else, he's not scared of her. And then they kiss.

Callie and Arizona

Somehow they are the couple other people want to be, and doling out very sound advice to prove it.

Callie's hard at work on research in the lab, and Arizona's got a complicated case with a little boy who had a cyst that burst, but in between they're counseling Teddy and Mark and Bailey, and they're getting along on top of it.

That is, until Callie shares a fantasy of them living in a big house with a bunch of kids years down the road, and Arizona  says she's not interested in having her own kids. Uh oh.