Ok, what stood out to me other than Christine:
Huge props to Amber. She's not trying to fix Ryan. She's moving away from him. Hopefully, he can find a way to fix himself. She cannot do it herself. Her mom would have tried staying in under the same situation. Speaking of Sarah (and Hank), booooo! She continues to make poor decisions after another. Not that being with Hank is necessarily bad, but her relationship with Mark just ended. It was way to soon to be in bed with Hank. It also confirms Mark was right to break it off.
My wife and I were laughing that Crosby was the sibling Adam called. Not hat Crosby is incapable (he's turning out to be a great dad), but he has zero experience with babies. Talk about jumping into the deep zone! I would have thought Julia or Sarah would have been called in since they have had babies. Overall, Crosby came through. And they hinted he may have a baby of his own.
Zeek was my favorite character this episode. The scene when Adam asked his dad to stay was touching. And he saved the Santavexperience for at least one more season.
Christine's story arc continues to be a heart wrencher. I have to give props to the writers for not having a breast cancer story but ending it quickly with an easy fix and everything is fine. They are showing just how hard this is, with radiation and the scary effects it causes. I wasn't sure she was going to survive the episode. I thought she would, as I figured it would be a "Christmas miracle" story. Seeing her computer message to her kids was touching.