Warning: Fullfor the episode follow...

I loved this episode. No, there weren't any big revelations on the Samaritan front. Or the Shaw front. Or a "number." Or any of that. In fact, the small moments in "Terra Incognita" that did involve the Machine felt sort of tacked on. Though I'll never turn down a chance to see Root as a runaway bride.What a phenomenal surprise it was to get Taraji P. Henson back for an episode. What a great move. One that nicely pairs with her recent success over on FOX's smash-hit, Empire.And by surprise, I of course mean that it was all nicely kept under wraps until a week or so ago. Which is still great by show business standards. The previews for this episode graciously left Carter out of the footage (leaving...not much), though you knew she'd show up. The news had broken. It wasn't being guarded. The question then became "How will Carter appear?" Dream? Flashback? And for how long?And - oh, man. I started weeping during the moment when Reese realized that he had, in fact, not talked about Jessica with Carter. That he'd only somehow imagined, or gaslit himself into believing, that he'd been more open with Carter than he had. That he'd never shared himself with her...and that now it was too late. What a freakin' powerful moment. I adored it. And how miserable it made me feel. Plus, the whole endgame where Reese was in danger of dying out in the wilderness alone because he'd shut people out of his life was incredible.Because even though Reese is on the cusp of starting a new relationship with Iris, there were still a lot of things that needed addressing. Hell, they needed addressing because he's about to start a new relationship with Iris. We needed to know more about Jessica (and why he really left her). And we needed to touch back to the suicidal mess he was years ago when Carter first met him.Despite the fact that Reese now likes a girl, and had been vaguely honest with her one or two times during therapy, he's still got a ton to work through. This crucible, essentially, cleared the road for him. It allowed him to forgive himself for a bunch of things while also providing closure for Carter. A more dignified closure than Reese's revenge warpath from back in Season 3.