DVO says not all happy families are alike, as Rita calls that dinner's ready and we get a close-up of the turkey. DVO continues that they are happy, aren't they? He wonders if the kids are normal. How you can tell a loving wife from a frightened one? Judging by Sally, it's mostly the crazed smile as she's telling you to go ahead and do naughty things with her teenage daughter, just PLEASE don't tell her husband! Dex then says, "A friendly neighbor, co-worker, sister, son. Are any of them what they seem, or are they bombs waiting to explode?" From the living room, eating off his TV tray, Harry says, "Happy Thanksgiving, son." He looks at him, shocked he's there, and Rita notices and asks if he's okay. He lies, "Yeah," then asks her if it is, isn't it. She says yes; everything's exactly as it should be: perfect. He says she's right. Then she asks if they can go around the table and everyone say what they're thankful for, but Dexter blurts, "No!" Deb looks like, "What the hell, dude?" And Rita looks sad. But he says he doesn't want the yummy food to get cold. Cody says he's thankful for Dexter, and Dexter smiles because, see? He's not like Arthur. He says "Let's eat" and finally takes a knife to the turkey.
Quinn and Christine make out in her doorway and she asks if he's sure he doesn't want to stay. He says he's too tired to stay the night (well, there is always the option of actually sleeping when you stay over); she made sure of that. She doesn't protest, but they make out. He says he'll see her tomorrow, and she says, "And the day after that, and after that." Are we supposed to think that he had a total change of heart about her in the course of this episode? Because she did nothing that would have that effect other than the blowjob, but that can't be the first time she's done that for him, can it? They say goodnight, and she says she's here if he changes his mind. She closes her door, looking happy. Then she gets a knock, and turns back to the door, all "Joey." But when she answers, it's Arthur, looking totally scary and crazed. The music is supposed to freak us out, like she's the next bathtub victim, but she just says, "Hi, Dad." So, is she in on it, and helping him cover it up? Or another victim like her (half-)siblings?
Next week: Joe R.'s back, and Dexter's making checklists: "Kill the guy you're looking for, remember to pick up diapers." He watches Arthur watch a potential next victim, and DVO wonders if he's set Trinity's next round in motion by saving his life. Dexter, on the phone with Arthur, asks him what he's doing. Arthur doesn't know what Dexter thinks he saw, but he doesn't appreciate being followed. In his big white, killing-people van. Deb grills Christine about how quickly she got to the Lundy crime scene. Christine calls Arthur and says, "Daddy, I think I'm in trouble." Arthur beats his phone against his steering wheel and says, "Stupid, stupid bitch!" Harry talks Dexter through figuring out that Arthur leaves four victims behind each time, not three. Then Arthur tells Dexter to walk away after maybe Dexter finds another body, which Arthur seems to put in concrete? Only three episodes left, and it's getting intense. When it airs, probably none of it will happen in that order, since these previews tend to mislead.