Dexter is struggling with having Debra on his back all the time. Since he can’t kill anyone, he can only imagine killing them, until that’s not enough. When a prisoner is being uncooperative with a DNA swab, Dexter ends up strangling him. When Deb confronts him, he tells that she can’t suppress his Dark Passenger, it’s not possible. And having her tailing him 24/7 is making it impossible for him to breathe. The only way that this can work is if he controls his murders, just the way that Harry taught him to do, or to at least have some room to think. After a lot of hesitation, Deb agrees to giving him space, but he has to continue being open with her. The moment Dexter gets some freedom, he looks for his next victim. And he finds him in Ray Speltzer, he killed multiple women after going out with them, but it couldn’t be proved.
Since Deb already knows that he’s a serial killer, Dexter wants her to understand how he picks his victims. He wants to prove to her that Harry taught him well and that his targets are well-deserving of their deaths. But even solid proof of Speltzer’s murders aren’t enough for Deb, it’s not his place to “take out the trash,” that is why there is the law. Dexter still insists on showing her proof that he’s a monster and is planning on tossing him into the ocean. Dexter heads to the cemetery where Speltzer works to investigate, but before he had the chance to learn anything, Deb calls him back to work. When he tells her that his lizard brain (the amygdala) is telling him that Speltzer has something hidden away in a mausoleum at the cemetery, she just gets more frustrated. And to push her further, he reminds her that his hunches that have locked up an astounding number of criminals come from the same place. He knows who the killers are because he is one himself.
Deb trusts Dexter’s intuition, so she goes to LaGuerta to try to push a search warrant for his place. Her explanation of her “lizard brain” just made her appear even stupider than she already seemed. LaGuerta responds to Deb as she did to Dexter: they are the cops, they can’t do that kind of thing. But she authorizes a patrol car to watch over his house. When the patrol cops say that Speltzer isn’t up to anything and take off, Deb decides she has to check on him herself. When she gets there, she hears a woman’s screams. She busts down the door and barges in to try to save the woman. By the time Dexter gets the voice mail from Deb letting him know she’s stopping by Speltzer’s place, he already found proof that he has killed before.
Dex rushes back to Speltzer’s house to try to save Deb. But before he gets there, Deb finds the woman and Speltzer finds her. His house is built into a maze with plastic wrap on the furniture. He dresses up in armor and a helmet (and looks a whole lot like the Dovahkiin) and chases down women in his house for sport before killing them. Right before Speltzer is going to take Deb out, Dexter arrives and knocks him out. They didn’t arrive in time to save the woman that Speltzer was toying with and Speltzer managed to make it out in time. He’s in the wind.
After this encounter, Deb finally understands what Dexter does. People like Ray Speltzer need to be taken out, and if the law can’t do it, someone else has to. She doesn’t accept what he does, she thinks it’s vile, but she doesn’t hate him for it. It’s a necessary evil. When she asks Dexter if he enjoys killing, he is brutally honest when he explains that he likes the way that killing makes him feel. She can’t stand to be around him or his trophies, so she asks him to move out. Dexter insists that nothing has to change between them, but Deb is definitely right when she says that everything has changed.
Though Deb and Dexter’s relationship has changed massively, Quinn doesn’t appear to be making any strides away from his old self. Just last season he was reamed for having a relationship with a witness, but he didn’t learn from his mistakes. He asks Nadia the stripper out, to which she gladly accepts. She doesn’t have much choice in the matter, though, Isaak tells her to keep tabs on Quinn and get any information out of him that she can. Luckily for Quinn, he picked someone genuine, so she lets him know of her boss’s plans. He doesn’t care. I don’t think he cares much about his job at this point either. He agrees to share information on Viktor if she shares information on Mike.
We aren’t graced with much of Hannah McKay’s (Yvonne Strahovski, Chuck) presence in this episode. Dexter goes to see her to get a DNA swab while Angel questions her about some souvenirs that Wayne Randall had. She tells them that she doesn’t know much about the murders, she was 15 and just fell in love with the wrong guy. She spent her six years in prison and doesn’t want to relive her terrible past. Dexter drops the DNA swab, which is quite odd since he is so precise when it comes to his work (and just about everything else, for that matter). Maybe it’s because she’s gorgeous or maybe he notices something off about her, or maybe both. They have a bit of a strange exchange regarding how they present themselves. And I’m sure this will be developed further in the coming episodes. Maybe there will even be a relationship brewing between the two.
Dexter thinks he can manage getting rid of his Louis problem without killing him, which ironically ends in Louis’s death. He has the ITK hand sent to Louis at work and asking for a refund, causing Masuka to fire him on the spot. And he anonymously sends the DVD of Louis and a hooker to Jamie, causing her to break up with him. He tries to blame it on Dexter, but this just proves Jamie’s point that he’s crazy. To get his revenge, Louis plans on sinking Dexter’s boat, A Slice of Life. But his timing couldn’t be worse. Isaak tracked Viktor’s GPS signal straight to the marina and to Dexter’s boat. Louis tells Isaak that the boat belongs to Dexter, but still gets a bullet to his head. Will Deb believe Dexter when he says that he didn’t kill Louis? And will the blood shed on his boat haunt him in the near future?