Cut to poor Dean, mouth agape. It's clear from his expression that Sam did not keep the details of that flashback to himself. Finally he speaks. "Sam?" Sam comes out of his reverie long enough to reply, "Yeah?" Dean says, "Too much information." Sam says he warned Dean he was going to come clean. Dean looks away. "Yeah, but now I feel dirty. Okay, well uh... brain-stabbing imagery aside, so far all you've told me about is a manipulative bitch who uh... screwed you, played mind games with you, and did everything in the book to get you to go bad." Slightly exasperated, Sam says there's more to the story. I bet there aren't any more shoulders, though. The crew just doesn't play that nice. Dean then says words that have never before parted his lips in this particular order: "Just... skip the nudity, please." Sam nods and looks down. "Pretty soon after... that, I put together some signs -- omens, that Lilith was in town, and I wanted to strike her first."
Flashback to above five months ago, at the ramshackle cabin, now of bonus ill repute! Sam takes off on a foolish kamikaze mission to kill Lilith, despite Ruby's pleas for patience. He doesn't have the Pimp Hand of Ipecac exorcism mojo down yet, so he says he'll bring the knife for back up. Ruby accuses him of wanting to die, so that he doesn't have to go on without Dean. I think she's just looking for more angry inter-species sex -- but although Sam pushes her against the wall, and brings his face right to hers, he then walks out the door. It's daytime. He arrives at a lovely house in a neighborhood full of the same. Through the window, we see a girl with long blonde hair, seated at a table. Knife at the ready, Sam slips in the back and scares the Hell out of the absolutely nothing in a closet that he mistakes for a room. He rounds the corner and we can see the girl more clearly, now. She's practically dressed like Alice in Wonderland. He's ready to stab her when she turns and cries, "Please, I want to go home."
Sam is still in shock when he is attacked from behind -- by two demons. He drops the knife. One of the demons says, "Lilith sends her regrets she couldn't make it." Ruby appears, picks up the knife and does away with Sam's first assailant in short order. As she takes on the other, she barks at Sam, "Take the girl and run!" The other demon is a formidable foe. When Ruby loses the knife, he pins her to the wall, by her neck (I think the stunt coordinator needs an intervention, regarding his addiction to this move). He says, "Ruby, you're in so much trouble. When we get you down in the basement, the things we're going to do to you..." Then he starts to gag. Ruby looks over his shoulder to see Sam. His magical Pimp Hand of Ipecac is finally out of beta. The demon loses strength and drops Ruby to her feet, as he falls to the floor in a cloud of his own filthy essence, which burns an expressway through the floor and straight back to Hell. Sam's nose bleeds, as does Ruby's lip. She says, "Sam?" He says, "I'm okay." He gasps for breath as he adds, "Thanks." Flash forward to Dean and Sam in their room. Sam explains that Ruby came back for him, and whatever Dean wants to say about it, she saved him. "More than that, she got through to me. What she said to me -- it's what you would have said." Ooh, do you see that look on Dean's face? Fight. Fight. Fight. Fight. No wait, more talking. From Sam. "If it wasn't for her, I wouldn't be here." Dean considers this as Sam waits with a half-resigned, half-hopeful expression on his weary young face.