Cristina is working away in a lab when Meredith finds her; it turns out she is trying to save the worms from all of the fluids that came out of her patient earlier. Sweet, but oooooooh, it's nasty too. Meredith sits down and rolls up her sleeve as she announces that she needs Cristina to take her blood so that she can be tested for the Alzheimer's gene. Cristina is clearly surprised but Meredith continues, trying to sound flip, asking what's a little bit of Alzheimer's when her uterus is already hostile? Cristina is traumatized, but hasn't lost her wits completely, and is obviously not as sure as Meredith about this, pointing out that this is more than a baby step. But Mere just tells her to do it before she changes her mind and, because they are besties and soulmates, Cristina does, and the two exchange a serious look before Mere turns and gazes out the window.

Lila is recovering from surgery and reading a book on Brazil when Mere trots in, a smile on her face and a bottle of pills in her hand. She gives them to Lila to help with her hand but warns her that she has to see her own doctor when she gets home. Lila looks skeptical but after a bit more nudging she agrees to go, though I'm not entirely sure I believe her, but they have a nice moment. But, we probably will never see Lila again and this was to help Mere face her own biological demons, so she's served her purpose. Mere VOs: "Biology says that we are who we are from birth.

"That our DNA is set in stone. Unchangeable." Ivan is out of surgery and Bailey tells him that there were complications, but he will be fine as long as he quits his worm habit. After she leaves, Cristina reaches in to her pocket and pulls out a jar containing the worm bits, and gently tells him that the surgery destroyed them all. He starts to cry, and after she gives him a moment he asks how long it will be until he's completely healed. Cristina thinks he's nuts and doesn't disguise that in her voice as she tells him point-blank that he could die if he tries this again. But Ivan is fired up, and says that would only be if he made the same mistakes before he starts talking about all of the different things he could try. Cristina cuts him off and instead asks why he would want to put himself through this again. It's time for her own Wise Patient Lesson, and he tells her that he loves what he does more than anything else, and that if you find something you love to do that much, you don't let go, you just throw yourself in even deeper. My goodness, this could pertain very closely to her own situation now, couldn't it? She gives an infinitesimal shake of her head like he's crazy, but something tells me that he got through to her, or else she wouldn't have tried to save those worms.