Sam goes to check out a report of peaceful people transforming into violent killers and discovers a connection to a case involving his grandfather. Meanwhile, Dean deals with the aftermaths of acquiring the Mark of Cain and Crowley is eager to take advantage of his weakness.moreless
Monroe makes a jolting attack on the Patriots while Gene and Miles look for potential allies in Willoughby. Neville and Jason find themselves in deep water when Doyle finds out about the poison. Aaron and Priscilla press onward.moreless
Crowley starts taking human blood again and Abaddon learns of his search for the First Blade. To find the Blade before the Knight of Hell does, Sam and Dean enlist the help of a former Man of Letters.moreless
The town of Willoughby has been turned into a reeducation facility, and Doyle makes things difficult for Tom.
While Castiel falls into the hands of Bartholomew and his faction of angels, Sam and Dean make a startling discovery about the Men of Letters bunker... and a special captive that Abaddon's demons are holding.moreless
Sam and Dean go undercover at a spa when murder victims turn up hundred of pounds lighter after their deaths. The brothers soon discover that something is feeding on the victims' fat.
With his wife held captive, Tom is ordered be President Davis to hunt down and kill Monroe. Meanwhile, Monroe, Charlie and Miles head off on a risky mission to new Vegas, to hire some mercenaries from one of Monroe's previous, but dodgy acquaintances.moreless
Garth ends up in the hospital, and Sam and Dean go to find out what happened. However, when they arrive, Garth goes on the run and the Winchesters are surprised to discover what really happened.moreless
Miles, Rachel and Bass kidnap Truman and infect him with typhus that the Patriots have engineering to persuade him to give up the location of the antidote.
Crowley and a reluctant Dean go on a road trip to find The First Blade, the only weapon that kill their mutual enemy, Abaddon. Meanwhile, Castiel proposes to use Gadreel's remaining grace in Sam to track the angel, but warns that it could cause Sam permanent damage.moreless
Monroe has to make a choice about his son, while Neville and Julia continue to take things carefully, which annoys Jason. Meanwhile, Gene shows Charlie an unexpected sight.
In the wake of Kevin's death, Castiel proposes a plan to Dean to help Sam retake control of his body from Gadreel. However, they have to turn to Crowley for help.
Miles, Monroe and Rachel head to Mexico to look for Miles' son.
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
When four members of the same church chastity group disappear, Sheriff Jody Mills calls in Sam and Dean for help. However, Dean soon disappears and Sam and Jody have to go after him.moreless
Miles, Rachel and Charlie continue their search for Aaron.
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
Aaron's experience with death attracts interest. Miles and his compatriots attempt to escape. Rachel and Gene's personal problems impact Charlie. Meanwhile, Neville takes his chances with the Patriots.
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
Rachel uncovers some worrying facts, and shares a moment of rapport with Charlie. Meanwhile, Neville and Jason continue to struggle with their relationship.
To solve two murders, Dean casts a spell to bond with the German Shepherd that witnessed both crimes. However, the spell has an... unfortunate side effect.
Monroe continues to be useful but is captured by The Patriots and sentenced to death.
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