Dean is haunted by Castiel, and Linda Tran is possessed by controlling her surroundings.
Dean sees Castiel, walking by the roadside, while Linda hires a witch to gather the ingredients for her Demon Obliviator by hiring a witch. Too bad Linda doesn’t know that witches are beholden to demons. Too bad Dean doesn’t know that Castiel was the one who decided not to leave Purgatory. Castiel doesn’t know how he escaped Purgatory, and Crowley doesn’t know what’s on the tablet.
But they find out. Linda and Kevin are betrayed by the witch and handed to Crowley. Crowley has assemble the entire body ofpotential prophets, waiting to take Kevin’s place, should he die. Crowley has leverage, as the King of Hell always will, and Linda is powerless. It is up to Kevin, who is in advanced placement after all, to hold out against the powers of Hell in protecting the Word of God. The Word of God that can seal the gates of hell, and also contains a cryptic message from the Angel Metatron
Dean finds out. He finds out that he had no power over Castiel’s refusal to leave Purgatory. And everything isn’t his responsibility. Castiel needed to serve his penance, and would not allow Dean to pull him out.
Castiel begins to find out. He was pulled from Purgatory to serve Naomi, whom he clearly defies in favor of the Winchesters.
Crowley finds out that there is a game changer. There is a way to seal the gates of hell. And the archangel Metatron has taken his leave of his Master in this world. And there is a compendium of tablets.