Thanksgiving is here, but that doesn’t keep Dexter (Michael C. Hall) from giving up his obsession with Arthur Mitchell (John Lithgow), a.k.a. the Trinity Killer. He wants to know what makes Arthur tick, what makes his family seem so normal, and what he can learn from him.

What he learns is ever-so-disturbing, even for a serial killer like Dexter. Jonah (Brando Eaton), Arthur’s teen-aged son, slips in a rage and tells Dexter (or Kyle Butler, as the Mitchell family knows him) that his dad beats him. He says that when his family is home, “it’s not a life. It’s a tour of duty.” Okay.

That’s a little creepy. But what he says next is even more intense: “You should have just let him die.” I’m thinking that Dexter feels the same way. So Jonah invites Dexter/Kyle to Thanksgiving dinner in an attempt to keep the Mitchell household calm and stable. It looks like Dexter is going to eat two Thanksgiving dinners this year.

Deb (Jennifer Carpenter) and Masuka (C.S. Lee) attend the Thanksgiving dinner at the Morgan household, and Rita (Julie Benz) has her own news: their neighbor Elliot (and the man with whom Rita had some seriously flirtatious vibes) will be at dinner also. What can I say? This Thanksgiving dinner…and the Mitchells’ dinner…are sure to be explosive.

Deb’s not the only one being guilt-tripped into a Thanksgiving celebration. Quinn (Desmond Harrington) gets the guilt trip from Christine (Courtney Ford), the reporter who now calls herself Quinn’s “girlfriend.” I don’t like this chick. She’s pushy, and there’s something off about her.

Back to the Mitchells. Dexter gets out of the house with a little white lie of having to work and heads over to Arthur’s house. Dexter finds padlocks on the windows and locks on Arthur’s daughter, Rebecca’s (Vanessa Marano) bedroom doors…to lock her in. Everything just keeps getting weirder when Dexter approaches Rebecca, asking about the locks. Instead of crying or asking for help, Rebecca, in so many words, tells Dexter that she’ll trade sexual favors for a ticket out of her house. This family is beyond screwed-up. During Thanksgiving dinner, all hell breaks loose, and Arthur’s mask slips completely off. Dexter’s own mask slips off as he tries to save the Mitchell family from the physical abuse of Arthur. But he doesn’t get the chance to kill Arthur, and he gets the hell out while he can.

Back at the Morgan house, Masuka gets a peek of Rita and Elliot kissing. Uh oh! I wonder if Dexter will kill Elliot when he finds out…

The real kicker of this episode? It looks as though Christine may have been the shooter who killed Lundy and injured Deb. And Christine just happens to be Arthur’s daughter. I told you I thought she was weird.