Dean, Sam, and Bobby must come to grips with Castiel, who now has the powers of God and sets off to redress the wrongs of the entire world. To defeat God, they must summon Death. Meanwhile, Sam tries to deal with his memories of Hell after the block in his mind cracks.
The Leviathans begin their plans to consume everyone who dwells on Earth. While Dean and Bobby try to track them down, Sam is still haunted by Lucifer, who only he can see or hear.
After escaping the Leviathans in Sioux Falls, the brothers hole up in Montana to heal their injuries. However, Sam reads about a local case of an icepick killer and takes off on his own to deal with it despite his recent mental issues.
Two men turn up dead, killed in a manner similar to crimes that they committed in the past. When the brothers investigate, they discover that the Egyptian god Osiris is judging people and weighing they're guilt... and if they are guilty, they meet a final, permanent justice. Osiris decides that his next target will be Dean.
Sam and Dean investigate three bizarre deaths in the same town and learn that the victims are all tied to a real estate developer, Don Stark. They soon realize that Don's wife, Maggie, is a witch and has learned that he had an affair and is striking down anyone close to him.
The Leviathans put a new plan into motion, having two of their own duplicate the Winchesters and go on a killing spree. While the brothers go out to dispose of their counterparts, Bobby interrogates their captive Leviathan and gets an unexpected visitor.
Despite their recent separation, Sam and Dean are forced to work together when they both end up in Lily Dale, the most psychic town in America, to investigate the bizarre deaths of two mediums.
During the brothers' annual pilgrimage to Las Vegas, Sam makes a life-shattering decision and takes on a new partner. Dean soon finds a new hunter as a partner, but the Winchesters meet again when they end up investigating the same case.
Dean, Sam, and Bobby investigate mysterious disappearances in New Jersey, attributed to the "Jersey Devil," but soon discover that the Leviathans are responsible and have a plan to conquer the country through the miracle of mass-marketing and fast food.
While Sam and Dean watch over a dying friend, Bobby teams up with Rufus to stop a Reaper.
While Dean tries to find Dick Roman, Sam looks into the disappearance of a hunter at a truck stop and teams up with the man's daughter to figure out what happened to her father.
Traffic -- Dear Mr. Fantasy, REO Speedwagon
-- Riding the Storm Out
When the brothers investigate the mummification deaths of two individuals in Canton, Ohio, they soon discover that they're up against a god... and Dean ends up transported to 1944 with no way back.
While the Winchesters investigate a string of brutal serial killings, Dean decides to go to a bar and pick up a woman. They end up having sex, but Dean soon discovers that his one-night stand is anything but.
Brett Detar -- The Devil's Gotta Earn, AC/DC
-- You Shook Me All Night Long
Sam and Dean investigate a case in Wichita involving a man who was killed by an octopus on dry land. They soon discover that childhood fears are coming to life, and that a children's pizza place is the center of the phenomena.
Sam and Dean return to the town where they tortured a demon for information four years earlier and then exorcised it. Now the demon is apparently back and taking up its old trade: killing woman. Meanwhile, Sam tries to cope with his visions of Lucifer.
The brothers investigate several cases of cursed antiques turning up in Portland, but soon discover something far more sinister when they learn that the Leviathans are buying up real estate in the area. Meanwhile, Sam is still plagued by Lucifer's voice in his head.
When Sam's worsening mental condition puts him into a psych hospital, Dean goes looking or a healer and finds one man seemingly blessed of God: a man who bears a striking resemblance to Castiel.
Dean's one-time hunting partner, Garth, calls him in when he runs up against an invisible monster that disembowels its victims. Garth and the Winchesters soon discover that someone has invoked a shojo, an alcohol spirit that someone can only see when they're drunk. Meanwhile, the Winchesters consider the possibility that Bobby's spirit is trying to contact them.
Special Guest Stars: DJ Qualls
as Garth Fitzgerald IV |
A hunter, Annie Hawkins, misses a meeting with the Winchesters. They discover that she was last seen at a famous haunted house and go to investigate... unaware that Bobby is with them as a ghost.
Dick Roman orders one of his computer programmers to hack Frank's computer drive and find out the information on the Winchesters' new identities. She goes along but soon finds out everything Frank knew about the Leviathans, and Dean and Sam recruit her to go after Dick and find out what he has planned.
When Dean and Sam open the clay tablet, an unsuspecting high school student becomes involved in the war against the Leviathans. Meanwhile, Meg calls the Winchesters with news about Castiel.
Dean and Sam must try to gain the two remaining components necessary to defeat Dick Roman: the blood of the Alpha Vampire and Crowley. Meanwhile, the Winchesters must also deal with Bobby, who is slowly giving into his rage and threatens to go out of control.
-- Why Can't We Be Friends
As Dick Roman prepares to make his move and turn the U.S. into a slaughterhouse, Sam and Dean attempt to assemble the weapon necessary to stop him. However, when Castiel refuses to fight, the Prophet Kevin is captured, Crowley joins the other side, and Bobby goes berserk, everything looks hopeless for the Winchesters.