De Lestrade and his team return once more with three new episodes of prestige-true-crime forerunner The Staircase, and Stephanie Early Green returns to discuss the end of the story. Did it need three more episodes? Does it do what it thinks it does in terms of casting Michael Peterson and his family as sympathetic, and Kathleen Peterson's sisters as obsessed harpies -- or the opposite? One of our theories of the case has changed somewhat since the last time we contemplated this twisty case, but as David Rudolf says, we just don't know. And like David Rudolf, we're about done thinking about this.