I think the twist to this episode matches some of the twists from the very best of The Twilight Zone. I had no idea where any of it was going, and for the first half I just felt confused (in a good way), and then the twist hit me like a pile of bricks and I couldn't stop staring at the screen. It's really cool to watch it again for a second time, and you'll see quite a few subtle signs.
The show is at its best when it depicts those on the fringes, not because fiction about the "normal" is bad, but because science-fiction about the "new normal" is difficult to make. I like this because it beautifully undermines their tendency to simply blame people for sins much older than the technology. An added twist: White Bear implies that it would be agonizing to watch it, and thereby live through it, again.