Outside, Dean questions Mary on what else the YED said to her, but she says he just said he liked her, and she wonders what he meant by that. Samuel comes out, pronouncing Liddy a strong kid who'll be fine, and my spider senses tingle. Mary's creeped out and wants to leave, so she gets in the car. Samuel congratulates Dean on a job well done in there, but Dean is utterly destroyed by the fact that he didn't kill YED. When Samuel tells Dean to take the compliment - that he's saying he was wrong about him, Dean looks at his painfully young mother waiting in the car, and tells Grandpa he needs to talk to him...alone.
In the Campbell's dining room, Dean tells his grandfather everything -- starting with the most important bit -- that they have to kill this thing before Mary dies. Grandpa's disturbed and skeptical. "What are you -- some kind of psychic now, too?" Dean sits next to him. "Listen to me. Now this is going to sound a little crazy. Actually, it's going to sound massively, massively crazy." At least he's self-aware. He explains that Mary's his mother, John's his father, Samuel's his grandfather; that he was born January 24, 1979. Samuel says he doesn't have to listen to this but Dean persists. "Mary was killed by a yellow-eyed demon in 1983 and I think that this, what happened tonight, that this is the moment that he caught her scent." What is with the monsters and the smelling? It's so gross. Dean explains that if they don't kill this thing and it gets away, that Mary will die. "So I'm asking you, please..."
Mary runs outside to John's waiting arms and reminds him he promised to take her away. He remembers, of course. She tells him to do it now. Deeply concerned, he watches her get into the car, and shuts the door behind her. If they've got to leave town, he's so grateful he didn't buy that ugly-ass VW Bus. Beige! What was she thinking?
Inside, Dean pleads his case to Samuel. He's not making this up. He knew about the Colt. He knew about the YED and where it would be. Samuel says, "Every bone in my body is aching to put you six feet under." Under a mountain of candy, and an ocean of hugs? Is that what you mean, Grandpa? "But, there's something about you -- I can't shake it. Now I may be crazier than you, son, but I believe you." Dean's eyes fill with tears of gratitude and he thanks him. He says John's journal is how they'll find the YED. Samuel checks that Dean has the Colt, and Dean puts it on the table beside him, as the audience screams, "Did Hell burn every lick of sense out of you, boy?" As Dean studies the journal, Grandpa's eyes dart to and from the journal. He pauses and says, "Here, let me see it." Dean looks up and starts to wake up, too. He slides the Colt a little further away and apologizes that he doesn't let anyone hold it. Samuel tries the "I'm your grandfather," bit, but Dean says it's nothing personal. Samuel says, "Sure it is. Especially when it's me you're trying to kill" and his eyes flash yellow. He raises a hand to mojo Dean across the room. Dean's quick, and grabs the Colt, but not quick enough to hold onto it. It falls to the floor as he and his chair sail backwards, clear across the dining room and into the adjoining living room. He's lucky Dean is (basically) an adult. If Grandpa YED did that to my kids, he'd be there all night. "Do it again, Grampy. Do it again!" until, in desperation, he turned the Colt on himself. Dean and chair crash into the wall and books fall from the shelves above him. YED gives him an evil glare, but Dean returns it with every ounce of hate he can muster, and it's anyone's game.