This was so sad in some ways. The writers did stack the deck but it still brings a tear. We learn quite a bit about the characters. First of all, Angela is the daughter of one of the guys in ZZ Top. Booth has a child, whom he sees sparingly, from an encounter in the past. There are others as well. The case involves a man brought in from a fallout shelter from decades ago. Shortly thereafter, a contaminate is released and everyone must be quarantined for Christmas Eve and Christmas Day. Yes, I recognize the heavy Christian thing going on. It is a bit too much, but the human element of the story overrides that one sidedness. The ultimate focus is on Brennan who lost her parents just before Christmas and is having a bad time. We hear a heartbreaking story. I would watch this every Christmas if I remembered it.