A man named Sonny calls Dean for help, and Sam is surprised to learn that Sonny and Dean spent time together at a home for delinquent boys. Sonny needs help dealing with a ghost and the Winchesters agree to help investigate. Meanwhile, Dean links up with an old girlfriend from his time in the home.moreless
When Castiel calls the Winchesters about mysterious disappearances in his neighborhood, Dean is forced to keep Sam (and Ezekiel) away from Castiel by asking to help Kevin and Crowley decipher the tablet. Meanwhile, Crowley asks for one phone call to Hell in return for his cooperation.moreless
The Winchesters call Charlie in to help them with a Men of Letters computer, only to discover a magical green-webbed wall that leads to the land of Oz. Now the trio must join forces with Dorothy to stop the Wicked Witch from traveling to the real world and wrecking havoc.moreless
Ezekiel warns the Winchesters that a group of disgruntled former angels are hunting their friend Castiel, and the brothers set out to find him before it's too late. Meanwhile, Castiel learns more about the human lifestyle.moreless
Dean has a surprise for Sam and Kevin: Crowley, locked up in the trunk of the Impala. While they try to track down the demons on Earth, Abaddon continues with her plan to rule Hell.moreless
Dean is devastated by the fact that the doctor tells him Sam won't make it, so he promises any angel willing to help that he will owe them a favor. Many angry angels want to find Dean and kill him, but Ezekiel gets to him first. At the same time, Sam is fighting for his life, and Castiel has a hard time surviving without his powers.moreless
Using the tablet half in his possession, Crowley prepares to make his final move in the grand game against Heaven. Only Dean, Sam, and Kevin can stop him. Meanwhile, Castiel and Metatron join forces and try to stop Naomi's scheme.moreless
Sam, Dean and Castiel are reunited and search the files of the Men of the Letters to find a film that could help them figure out the third trial. Meanwhile, Metatron asks for Castiel's advice about the problems in Heaven, and Crowley delves into the brothers' past... and some familiar facesmoreless
Sam and Dean receive a video message from Kevin which leads them to a casino in Colorado, where they find a mysterious recluse that might help them fill in the gaps in Kevin's research. At the same time, Crowley is winning at the tables. Meanwhile, Castiel tries to escape from Naomi and the other angels that are after him.moreless
Dean is concerned about the physical impact the second trial had on Sam, so he insists that Sam stop hunting for a while. When Charlie comes across a case and finds the boys, Dean decides it's time to teach her how to be a hunter. However, the boys suspect she is hiding something from them that could get her killed.moreless
Kevin calls in Sam and Dean when he hears Crowley inside of his mind. The brothers end up turning to Ajay, a Reaper, to help Sam with the second trial of the Tablet. Meanwhile, Naomi secretly visits Dean and gives him vital information, forcing him to seek out Benny's help.moreless
Sam and Dean meet up with an old friend, Krissy Chambers, and discover that a Hunter has taken her and other orphans in and is teaching them how to be Hunters. Dean is suspicious of the Hunter's motives, while Sam is interested in how the man is giving the orphans a home life, something he never had.moreless
Castiel returns and asks Sam and Dean to help him against demons seeking Lucifer's Crypt. When they set out to take on the demons, they rescue Meg, who is being interrogated for information. While Dean and Castiel go to find the Crypt, Sam and Meg fight a rearguard action to hold Crowley off.moreless
The Winchesters investigate a case involving an amnesiac zombie and discover that he's the Greek Titan, Prometheus... and that the goddess Artemis wants him dead.
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