Dexter (Michael C. Hall) has stumbled upon some very interesting—and somewhat disturbing—information. Trinity (John Lithgow), a.k.a. Arthur Mitchell, is a father, husband, teacher and deacon…when he’s not slaughtering unsuspecting victims. Those of us watching are thrown off, kind of disturbed by the fact that a man who leads church on Sundays is a serial killer.

Trinity’s bludgeoning victim has been found, and Dexter is doing his best not to let the police department know as much as he knows…otherwise, our heroic serial killer may not be able to dole out his punishment to the Trinity Killer.

Masuka (C.S. Lee) is on his game, though, and seems to be finding out a lot about Trinity faster than Dexter expected. One interesting fact that comes out? Trinity’s sister killed herself in a bathtub, his mother jumped to her death, and his father was a bludgeoning victim. It seems as though Trinity is reliving these terrible memories through his killings. In other words, he is one messed-up dude.

Dexter goes to work inserting himself into Trinity’s life. As “Kyle Butler,” he volunteers with Arthur Mitchell to build a home…and does his best to get close to the serial killer. In an attempt to see the “real” Arthur, Dexter picks up an urn containing the ashes of Arthur’s sister. And Arthur flips out, slamming Dexter into the wall in a choke hold. This kind of violence is like a guilty pleasure for me, I must admit.

On Dexter’s home front, I have to say: Am I the only one who’s getting awfully tired of Rita (Julie Benz)? Poor Dexter tries and tries to get back on her good side, and she continues to snap at him and make sarcastic comments. I kind of want to slap her around. During their couple’s therapy, Rita cries a lot and attacks Dexter a lot. But there is a breakthrough when Dexter comes clean as to why he wanted to keep his apartment: he needs space, he says logically. And magically, that’s all that Rita needed to know. So she gives Dexter his own space in the form of a shed in their backyard…the perfect place for Dexter to hide his Dark Passenger.

Poor Deb (Jennifer Carpenter) is still trying to make peace with Lundy’s (Keith Carradine) death. She’s convinced that Nicky, one half of the Vacation Murderers, is responsible. That is, until she talks to Nikki face to face. And until she finds out that a lot of Lundy’s notes about the Trinity Killer are missing. Now she’s convinced that Trinity is responsible for the theft (although we all know it was Dexter) and for the shooting.

Everything is coming together beautifully. Dexter is becoming buddy-buddy with Trinity, Deb is determined to find the Trinity Killer and seek closure, and Rita is finally laying off of our favorite serial killer. I can only wonder what kind of screw-ups will cause friction in next week’s episode.