Sam and Dean investigate an angel slaughter and discover that Castiel is already looking into the matter. The individual responsible captures Castiel, while Dean wonders whether ti's time to tell Sam the truth about Ezekiel.moreless
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
Texas Ranger John Fry comes to town who may be the only man capable of taking down The Patriots.
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
Monroe saves Charlie from a potentially nasty encounter, but Charlie refuses to give him an inch of trust. Miles and Rachel start planning a resistance movement against the Patriots. Neville deals with a problem regarding his boss.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
Rachel breaks Miles out taking Titas Andover's ill wife with them, leading to all the tribesmen bearing down on Wiloughby.
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
Neville devises a plan to infiltrate the ranks of the of the Patriots, Miles is captured by Titus Andover and Dr. Porter tries to revive Aaron.
After the power is turned on, Rachel Aaron and Miles end up in a small town. Neville searches for his wife with Jason.
The rebels manage to infiltrate the tower and Aaron's know-how comes in handy tuning the power back on.
When the rebels discover a way into the tower, a deadly battle between Miles and Monroe occurs and the Nevilles are excluded.
Nora is captured and tortured and Monroe finds out that Rachel is going to the tower, but doesn't know the full extent of her plan. Miles looks for a murderer in his ranks.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
Drone strikes against the militia threaten to destroy the budding relationships between Charlie and Jason, and Miles and Nora. Monroe's paranoia escalates after an attack on his life. Foster considers surrendering and Rachel and Aaron continue on their journey to restore power.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
In order to keep the anthrax bacteria out of Monroe's hands, Miles attempts to liberate Dr. Ethan. Aaron and Rachel are captured by the militia, and Miles finds himself working with Neville who has amazingly become a commissioned officer of the Georgia Federation.moreless
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
Troubles befall Aaron on his journey with Rachel to the mysterious tower, and a woman form Monroe and Miles' past causes emotional havoc for the two.
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
Miles needs to stop a mad bomber while Rachel starts her quest to turn the power back on for the rest of the planet.
Neville is captured by Miles. Rachel journeys to a mysterious tower which holds the only chance of restoring power.