Andrea watches this exchange from the window of her home. She sends Lucas upstairs and tells him to stay there, door locked.
Cut back out to Dean's Deep Thoughts While Looking Down the Barrel of a Gun. Andrea runs up to the men and then pauses to let them continue their discussion. The discussion with gun, that is. Sam tells Rangerpoliceman that Peter's spirit is pissed and that it is going to take Andrea and Lucas and then come after him. Then it'll take their bodies "God knows where" so that they all feel like Peter's mom did. Rangerpoliceman is like, "You bitches be crazy," but Dean and Sam don't really care. It's Dean's turn to be stern now as he tells it to Rangerpoliceman straight: "We need to find the remains, salt them and burn them. Now tell me you buried him somewhere. Tell me you didn't just let him go in the lake."
Lucas is watching all this, crouched behind a fence, when he hears a voice whisper, "Come play with me." He heads off toward the voice.
Andrea demands her father tell her the truth. He take the deep breath of the I Acted Sternly and Now I Must Die Because Hollywood Is a Liberal Bastion of Touchy-Feely New-Age Types and doesn't say anything. Andrea realizes her father really did kill Peter all those years ago. Now he confesses: they were at the lake, they always bullied Peter, this time it got rough, they held his head under the water and he died. But they didn't mean it! They let go of the body and it sank. Sam has tears in his eyes. Rangerpoliceman begs his daughter to listen to reason: "To say I have anything to do with these drownings, because of some ghost? It's not rational." With no remains to burn, Dean realizes they just have to get away from the lake. What better time, of course, to notice that Lucas is hanging around the lake's edge.
Lucas, on the dock in front of the Carlton's house -- is that where they were? I thought they were at Andrea's house (please note how politely... er, passive-aggressively I just pointed out that the location is whack) -- leans toward the water as the voice whispers to him. He's reaching for some little green thing, which I don't quite get. The Foolsome Foursome rush toward the lake just as a sooty-dark child's arm reaches up and drags Lucas into the water, while metal clashes clash -- as they do quite often on the soundtrack.