2x21 All Hell Breaks Loose, Part 1
When the boys stop at a diner, Sam goes to buy food, while Dean muses about pie. Suddenly the radio starts cutting out. Dean rushes into the diner to find Sam gone and the staff and customers dead, and sulfur staining the back door.
Dean goes to Bobby for help, but he has no information on demonic activity across the country. However, he says that he just talked to Ellen at the Roadhouse and she might have something for them. Dean and Bobby head for the Roadhouse to see her.
Sam wakes up to find himself in a deserted town. He runs into Andy, whom he’d previously met (2.05 Simon Said) when Andy’s twin brother was using his psychic powers to kill people. Together they find Ava who thinks she has only been there for half an hour even though it is five months since Sam last saw her (Hunted). Also in the town are Jake Talley, an American soldier on duty in Afghanistan, and Lily. Lily reveals that her power is that people’s hearts stop when she touches them; Jake’s that he is super strong.
The group is doubtful when Sam explains that a demon is behind things, until an Acheri Demon in the shape of a young girl, attacks Jake. While Sam leads the group to find supplies and weapons, Lily tries to leave the town through the woods, but is killed by the demon. Desperate for Dean’s help, Sam gets Andy to try and send him a vision of where they are.
Dean and Bobby have arrived at Harvelle’s Roadhouse, only to find it burnt out and the occupants dead. They cannot tell if Ellen was there when the fire hit. Dean is suddenly struck by flashes of images sent by Andy. With Bobby’s help they work out that Sam is in Cold Oak, South Dakota.
Sam has surrounded a room with a salt line, and as they wait for what may come, Sam dozes off. The Yellow-Eyed Demon appears to him, and explains that his plan is for the children with special powers to fight amongst themselves until the strongest is left to lead the Demon’s army. He tells Sam, with his leadership qualities and hunter training, is his favorite. The Demon admits to killing Jessica so Sam would go back to hunting. He then shows Sam a vision of what happened the night Mary died. Sam sees that the Demon fed drops of his blood to baby Sam, and that Mary knew the Demon.
On waking Sam finds Ava has disappeared, and he and Jake go to look for her. Ava returns to the room, breaks the salt line, and summons an Acheri Demon who kills Andy. When Sam returns and confronts her, she admits that she has spent the last five months developing her powers, and killing the other children who arrived. Just as she summons another demon, Jake kills her.
As Sam and Jake prepare to leave the town, Jake admits he doesn’t trust Sam and attacks him. After a fight, Jake appears to be unconscious. At that moment Dean and Bobby arrive. As Sam walks towards Dean, Jake grabs a knife and stabs him in the back. Bobby chases him. Sam collapses into Dean's arms and is unresponsive to Dean's pleas for him not to leave him. As Dean claims it's his job to take care of Sam he sees the truth, that Sam has slipped away. Sam spends his final moments cradled in his distraught brother's arms.
SuperPretendWiki entry
2x22 All Hell Breaks Loose, Part Two
____