Is this the beginning of the end of Meredith and Cristina's bestie-hood? In a new sneak peek from Grey's Anatomy Season 10 Episode 5, "I Bet It Stung," the two ladies start getting territorial over a patient — their facade of cheerfulness doing little to hide their annoyance with each other.

The preview was first shown during Sandra's appearance on Katie. We've embedded the video below, and you can skip straight to the 31-second mark to get to the good stuff.

In the scene, Meredith (Ellen Pompeo) asks Cristina (Sandra Oh) about one of her patients and touts that she was the one who diagnosed the woman with familial hypercholesterolemia.

"Oh, well, you were right," Cristina says, in sort of a "OK, end of conversation" way.

"So let me take the liver," Meredith persists.

"Really?" Cristina asks, perkily. "I guess I thought you were easing back in…?"

Uh-huh. You're not fooling us, Cristina. That's one of those "I'm doing you a favor" ways of serving yourself.

She asks Mer if she has read a new article about the simultaneous heart-liver transplant procedure that's on deck for the patient, and Mer says that she has not but that she will!

Thus starts that whole epic blowout we saw teased in last week's on-air promo. Be sure to watch the clip below to see Ellen and Sandra nailing awkward OR politics, and then watch the whole episode on Thursday, October 17, at 9 p.m. ET on ABC.
 


Dan Clarendon is an assistant editor at Wetpaint Entertainment. Follow him on Twitter and Google+!