A witch's familiar asks the Winchesters for help when the witch, a cop who helped Sam and Dean on a case, has nightmares of murder that come true.
Kevin translates the tablet and finds the way to close the gates of Hell. He tells Sam and Dean that in order to do so, one person has to face three tasks designed by God, one of which is killing a hellhound, and the brothers argue about who should complete the tasks.moreless
The brothers look into the death of Rabbi Bass, who spontaneously combusted. Things get complicated when they find out that the rabbi was researching Nazi necromancers. A golem that belongs to the Rabbi's grandson, Aaron, attacks them. However, since Aaron doesn't know how to control him, everyone is in danger.moreless
Sam and Dean's grandfather travels forward through time to the present to get help from John Winchester in stopping a demon, Abaddon.
Sam and Dean look into the deaths of two people involved in Live Action Role Playing (LARP), playing a game named Moondoor. They discover that Charlie Bradbury is involved in the game and soon learn that someone has summoned a fairy to kill his or her enemies.moreless
Naomi informs Castiel that Crowley holds an angel captive and he must save him so that Crowley doesn't learn their secrets. Castiel asks for Dean's help. Sam meets with Amelia, who asks him to chose whether to stay with her or never contact her again.moreless
Sam asks a friend, hunter Martin Creaser, to track Benny just to be on the safe side. However, when Martin gets word of a vampire kill in Benny's neighborhood, he takes things into his own hands, forcing Dean to make a tough choice.moreless
Sam and Dean take on a case with Castiel, who has decided to become a hunter. However, they discover that the murder is only the latest in a string of cartoon deaths.
Sam and Dean are surprised to discover that Castiel has escaped from Purgatory, but doesn't remember how. Meanwhile, Kevin and his mother turn to a witch for help against Crowley but she betrays them to the King of Hell.moreless
While investigating murders involving an avenging ghost, Sam and Dean discover that Garth has taken on Bobby's role as hunter coordinator.
Dean goes to help Benny, who has run afoul of vampires guarding his Maker. Left alone, Sam thinks about his year of retirement, but is soon called back in when Dean calls him for help.moreless
The Winchesters track down a killer and the investigation leads them to found footage of three college students investigating mysterious animal attacks.
After a series of brutal murders where the victims had their hearts torn out, the Winchesters track down and locate the killer. However, they soon realize that he's not the only killer and the others are still at large.moreless
Crowley takes Kevin's mother hostage in an attempt to recover Kevin as he searches for the tablet. The Winchesters help Kevin rescue her, only to discover that she insists on joining them on their quest.moreless
When several people kill themselves under strange circumstances, Sam and Dean discover that they were driven insane by the Goddess of Truth, who forced them to tell the truth against their will. However, when the brothers track down the goddess, Veritas, she uses her powers on Dean.moreless