Don asks Sylvia to remove her cross. She tells him she won’t, and he turns it around so he can’t see it. She tells him she prays for him to find peace. What she doesn’t yet realize (or maybe she does; Sylvia is an interesting character, beautifully played by Cardellini) is that Don Draper will never find peace.
There are two ways to view tonight’s episode of Revolution, both equally valid. One involves completely shutting off one’s brain to an extent that very few television shows or movies require you to do and enjoying the ride. The other involves taking it with a modicum of seriousness, which means going after ridiculous plotholes and developments.