Kelsey is feeling her chest, disconcerted by her lack of a heartbeat. She tells them about what it was like to climb the Inca Trail back before all this happened, and how you were alone then with your own heartbeat. As Cristina examines her, Kelsey admits to Teddy that she is getting tired, but Cristina tells her to just hang on until New Year's Eve, which is a virtual "organpalooza" of drunk drivers and brain death. Teddy looks a little bit troubled at her glamorizing these things, but she keeps quiet and Boyfriend just tells Kelsey to hold on so that they can hike together one day, reminding her that it's beautiful outside the hospital and even snowing outside. It's a really sweet touch that there's a little Christmas tree in her room, and I like to imagine Boyfriend brought in for her. Kelsey, upon hearing about the snow, tells the docs that she needs to go outside. Both women simultaneously ask, "What?" and Kelsey tells them that she might die, and snow is her favorite thing in the world. Cristina starts to shut her down but Teddy says they can do it, to Cristina's -- and to a point, Boyfriend's -- skepticism.
While Derek works away on a light-up practice brain, Mark talks about Sloan and how he wants to just run away where nowhere can find him, he doesn't even know what she wants since they haven't talked, and his guilt. Derek tries to clear him of that guilt by pointing out that Mark didn't know, but Mark admits that he did know Samantha got pregnant, and that he gave her cash and left, assuming she had an abortion. Derek thinks a second and says that now Mark is a different guy now, not 18 anymore. I get the impression he's supposed to mean it but he's still kind of distracted and sounds kind of insincere. There isn't much time to think about it, though, because Arizona comes in and reports that Nicholas is back with a really bad nosebleed. Derek isn't ready, so Arizona says she'll transfuse until it is. She asks if it's going to be soon, sounding hopeful, but neither man answers her.
Bailey's dad, Bill, is up in the gallery watching a surgery when Callie finds him and introduces herself. She tells him that Bailey is doing a hernia repair, which is something they get a lot of at Christmas with all the heavy lifting, also talking happily about the extra broken bones they see. As if it's a logical next topic, she then says that she's now dating women. Bill is taken aback, but Callie explains that her family had a hard time but they are now working through it, and she brings it up because Bailey told her that Bill is having a hard time with the divorce. Very sincerely, she tells him that Bailey didn't come to the decision lightly, and that she's a great person. She seems to read on his face that she overstepped her bounds and stops herself, wishing him a merry Christmas.