When Bobby mysteriously drops into a coma in Pittsburgh, Our Intrepid Heroes are forced to stop feeling sorry for themselves long enough to road-trip over to Pennsylvania to figure out what the hell is really going on. Seems some all-too-human psycho got himself addicted to a magical herb that allows him to creep through other people"s dreams, and when Bobby got a little too close to cutting off the freak"s supply of the stuff, the lunatic waited until Bobby fell asleep, and then ensnared him in a permanent nightmare in which Bobby"s long-deceased wife endlessly torments him, because Bobby stabbed her to death after she got herself possessed by a demon oh, so many years ago. Sam and Dean swallow some of the magical herb themselves, though, and manage to snap Bobby out of it, but the freak makes a run for it, and the boys eventually realize that they"ll have to put themselves under again in an attempt to lure Batshit Boy out into the open. Well, out into the open of their dreamscape. Or something. Shut up. It made sense when I was watching it.
And so, lure him they do. Unfortunately, Batshit Jeremy"s become quite adept at manipulating others" nightmares, and he quickly splits them up, the better for Dean to beat himself to death with his insecurities, fears, and Daddy Issues while Jeremy beats Sam to death with a baseball bat. Fortunately, Sam -- perhaps because of his lingering psychic abilities -- manages to get the upper hand when he dredges up some wicked Daddy Issues Batshit Jeremy"s been hanging onto for the last two decades, and he winds up saving both his brother and himself when he bashes Batshit"s brains out.
Oh, and Posh Bela steals The Fucking Colt. God, I hate her.