In the car, Dean remarks that the suicide wasn't exactly KC's fault. Sam dryly replies, "You know as well as I do. Spirits don't exactly see shades of grey, Dean." Dean's unconvinced. Sam realizes that just smashing the original mirror might not take care of the problem, since Mary moves from mirror to mirror, so why wouldn't she just hide out in another mirror while they take a sledgehammer to her home mirror. This is all getting a bit literal for my taste. Do we really have to chart her physical migration here? Sam thinks they need to summon her and then pin her down. Dean's unconvinced by this plan, and Sam admits that he doesn't know if it'll work. He then decides to remind us that it is, in fact, all about him, and says that he'll summon Mary: "She'll come after me." Oh, cry me a river, you poor little boy. Your girlfriend got murdered by a malevolent spirit, pinned to a ceiling with an unflattering leg position and then lit on fire? Tell me something I don't already know all about. Dean, happily, feels just the same, and says, "All right, that's it," and pulls the Metallicar over on the side of the road.Dean turns the car off. It is pouring rain. Dean confronts Sam: "You think this is about Jessica? You think that's your secret? That you killed Jessica? Sam, this has gotta stop." Sam is silent and toughjawed. Dean continues, telling Sam that it wasn't his fault, and that he needs to start blaming whatever it was that killed Jessica. He even offers himself up, telling Sam to go ahead and blame him for taking him away from Jessica in the first place. This finally gets through to Sam, who turns to Dean and says, "I don't blame you." They keep going back and forth for a while until Dean finally observes that none of this is a secret, so it wouldn't work with Bloody Mary anyway. Sam corrects him, "No, you don't. You don't know all about it." Then he refuses to elaborate, in order to keep the secret for his damned fool plan. Sam reminds him about KC huddling trapped in their motel room, and Dean drools in anticipation.
Antique shop. Sam picks the lock, and the boys walk into a shop with about a hundred old mirrors. Dean pulls out one of the crime-scene photos and says they just need to start looking. The set is exceedingly dark. The boys have their flashlights up in backhand position. Why don't people on spooky television shows ever hold their flashlights like normal people do? In slow-pitch softball grip? They poke around for a while. On a wall, what looks like a silent alarm is blinking. Sam finally comes upon it, in traditional fashion, by simply walking around until obviously confronted with whatever it was he was looking for. They look at it apprehensively for a bit.