Back to the house of pain, where Owen has moved on from the No. 1 most infuriatingly woman-hating think a husband can tell his wife ("Why won't you just shut up and have my baby?!") to No. 2 on the list: "I hate that you're so close with your friends." Actually, Owen manages to combine the two, somehow making the case that since Meredith has a baby now, Cristina should want one too. (BRB -- drinking.) After all, they do everything else together; it's like they're a team. Cristina reminds him of what we all know: Meredith is her person. Owen yells that HE should be her person. Okay! Now we're getting into semi-defensible territory. Not saying Mere shouldn't be Cristina's person, too, but you can see where Owen would feel shut out. But Cristina feels the same thing: "Be MY person!" she yells back at him. Be her person. Have her back. Seems reasonable. ...What am I saying? These two are doomed.
After the break, Meredith and Callie are doing the toe transplant, and there don't seem to be any problems. Callie isn't even having to ask Meredith if she's sure every time she makes a decision. "You're impressive," she finally tells Mere, who is like, "But we knew this?" Turns out, Callie's always thought there was a lot of hype surrounding Ellis Grey's Daughter and this is the first time she's seeing Mere as a badass surgeon in her own right. God, between this and Bailey getting bitched out in the O.R., it's like this episode is playing out the vapor trail of the What If? show. Callie goes on to recap how she and Meredith have never been friends, not even when she was with George (I'd say especially when she was with George but whatever). Mostly because Meredith thought Callie was a freak and Callie (though she stops short of saying it outright) was intimidated because Mere was the skinny, blonde, pretty girl. But now they are both married and with babies and a lot more alike. Meredith, with the blasé confidence of the skinny, blonde, pretty girl, is like, "You're not a freak. And we CAN be friends!" Callie, who is sometimes the best, narrows her eyes at this involuntary condescension and lays it down: she's going to help Meredith study for the boards, but it's going to be WORK, and Mere will show up on time and WORK or else risk an ass-kicking. This could be fun.
Amelia and Derek are teaming up to get this catheter procedure down in under 90 seconds. Still not quite working, but they're getting there. Lexie comes in with an update on another patient and is heartened by the progress, though Derek still says this is but one step in removing a very complicated tumor. He sends her away, but she spots the photo of Mason on the wall and becomes possessed with a deep and abiding love for Private Practice characters. "I want to go down trying," she says. Derek tells her to pick up the stopwatch.