Warning: Fullfor the episode follow...

"Court is in session."

There was way more stuff going on in "A House Divided" than I could have anticipated. A lot of moving parts, all exciting and great. But my favorite part was how it re-branded Vigilance as a formidable and tragically noble force. For most of Season 3, they've been the perennial party crashers. The second group brought in during various tense situations involving either HR or Decima. The guys who make bad situations worse. But here, they ascended.And the ending totally threw me for a loop in an amazing way. It's hard to not watch Person of Interest and feel Jonathan Nolan's contributions to the Dark Knight Trilogy nestled within its themes and style. But the crazy mock courtroom that Collier had set up right at the end totally felt like something a deranged Batman villain would do. Like Two-Face, if we want to keep things within the "prosecuting attorney" umbrella. But Joker wouldn't be above the theatrics of a live trial either. He'd just probably have to be the judge. And if we want to draw a direct connection to The Dark Knight Rises' "Jonathan Crane-as-judge" scenario, we certainly can as well.And so by the end of "A House Divided," all the time Reese, Shaw, and Root had spent trying to thwart Decima (or avoid being killed by Decima) got side-swiped by the one group who'd like to see everyone hang. Control, Greer, Garrison, Finch, they were all on the chopping block there at the end. And it all seemed totally fitting given that the last huge seditious act that Collier committed was releasing those black ops documents about Northern Lights to the press. Because he's not only about revenge. He's about exposing the true villains to the world.The Collier flashbacks were a great freakin' bonus too. An unfinished story too it seems, since we never found out who texted him there right at the end. Assumedly to tell him that his brother hadn't even committed suicide like he'd been told. Was it Nathan Ingram? He could have still been alive during that time in 2010. He's the only person I could think of (since chances are it's someone we've met already). But yeah, great use of flashbacks to give Collier - real name Peter Brandt - even more texture.Person of Interest really does tackle interesting themes for a "network procedural" (that's grown wonderfully less and less procedural). The way it takes a can opener to a lot of important issues of the day, ones that most other shows can't be bothered with, really does help give it an extra edge. And it's crazy to think that a person could actually be able to see both Control's side of the argument as it pertains to preventive measures as well as Collier's side which deals with the thuggish mugging of our personal liberties and privacy.Even Greer, of all people, offered up some nifty personal motivations for his underlying desire to be ruled by a logical, impartial, uncorrupt machine rather than grant power to the lesser evils of humankind. Those who'd lie, cheat, and steal to line their own pockets and protect their own interests. And his speech to Finch about living underground for months in order to survive the 1940 Blitz of London was superb.But then Finch put a new spin on the possible future threat of Samaritan - likening it, quite accurately, to Skynet (my word, not his). A system that could one day see all humanity as irrelevant. Meanwhile, Greer chastised him for being too afraid and/or jealous of his creation to allow it to reach its full potential.Granted, "A House Divided" didn't really pick up fully until Vigilance came calling - something we surely expected given the Collier scenes from four years previous. The first half involved Root trying her best, with the help of past hackers that she'd helped save (including Daniel Casey), to follow orders from a Machine that couldn't grasp the full picture. Only to then have everyone lose the picture entirely during a giant city-wide blackout caused by Vigilance.And all the while, Garrison and Control worked to get the president's advisor to approve turning over the government surveillance feeds to a system that's privately owned by a third party. But all those best laid plans were about to get interloped like crazy. And at this point now, heading into the season finale, I'm glad to have most everyone in the same room. Everyone's been attacking the same story from different sides, so I look forward to a somewhat streamlined endgame.