I watched The Sinner season 2 season finale last week. It had a very shocking ending. I would have never guessed it.
The second season was a boy who had killed his “parents” in a motel room. Later it was revealed that he is part of a cult. (I saw a show on the Travel Channel about a real-life cult that was similar to the one in The Sinner.)
I hope they do another season of this show.