Speaking of Masuka, Deb takes the Christine sample to him and needs it analyzed ASAP. Despite his protests that Project Runway is on, he gives in. Deb won't say who the sample belongs to, though.
The next morning, Dexter still has eight houses to check for Arthur. He gets a call from LaGuerta hounding him for the blood report (on the SANDWICH GUY -- damn, Dexter, there's dragging your feet and there's this). His mouth promises the report in a half-hour, but the missing-child flyer on his lap says "half past whenever I kill Trinity."
Back at the Joseph Quinn House of Easily Manipulated Walking Boners, Quinn asks Christine what her Christmas plans are. What about her family? She says they're not close. She also notices that her toothbrush is gone, and she's not at all suspicious when Quinn says the cleaning lady must've thrown it out and then immediately produces a brand new one. Smooth, detective. Real smooth. In fact, she only gets pissed when she tries to get in his pants and he's not into it. She asks if Deb said anything to him. Rapidly unraveling -- again -- she complains about the shitty interview Deb gave and then says she's gonna be late for work. Quinn begins to look concerned.
Christine calls her dad from the car and has to leave a voice mail message. "We might be in trouble," she says. "We have to talk about that woman. In the bathtub. That night. When I was little."
In the basement, Arthur plays with his train set and generally ignores Scott's questions about when he can go. Scott finally gets fed up and kicks at the train, then kind of awesomely crosses his arms and demands to be taken home to his parents. I like this kid. He clearly has no respect for Arthur and his weak-ass toy trains. Lest you think Arthur would react to such insolence with anger or violence ... uh, nope. He just looks sad and starts singing along to the record. Then he starts crying, and Scott asks why. "It was Vera's favorite song," he whimpers. He explains all about Vera and keeps repeating that it wasn't his fault. Scott is moved by this and says he's sorry about Vera. "If it makes you feel any better," he says, "you can call me Arthur." Aw. What a sweet corpse this kid is. Scott says they can play trains some, and then Arthur can take him home. He's probably just being naïve or Stockholm-y or whatever, but I like Scott, so I'm secretly hoping he's setting Arthur up. Arthur calls "Arthur" a dear boy and an innocent. "Promise me you'll always stay that way." Scott: "Uh, sure." Arthur then offers the kid some ice cream. And before you start getting visions of this unbalanced old man and adorable child bonding over shared Neapolitan, we see Arthur load up Scott's ice cream dish with drugs. He promises that after Scott finishes, "I think it's time we let you go free." Lies or horrifying metaphorical truth?