Sam and Dean realize that they have an enormous task in hunting down hundreds of demons that escaped from the Devil's Gate; Bobby tells the brothers about a sighting in Nebraska that turns out to be manifestations of the seven deadly sins.
Dean visits a woman with whom he had a tryst nine years ago and finds she has an 8-year-old son who resembles him; Sam and Dean discover that a parasitic demon is snatching children and assuming their forms; Ruby reveals startling information.
Sam and Dean learn that someone has stolen a cursed rabbit's foot from John's secret storage room in New York and call on Bobby (Jim Beaver) for assistance.
Sam and Dean investigate a rash of violent deaths in an Ohio town that is a haven for gamblers and drinkers; Ruby helps Bobby rebuild the Colt from scratch.
Sam and Dean investigate a small town that has been plagued by strange murders whose scenes resemble those of fairy tales; Sam summons the Crossroad Demon (Sandra McCoy).
Sam and Dean investigate mysterious drownings of people who were not near water; a victim's family pays Bela to solve the case.
Sam and Dean capture a vampire (Mercedes McNab) who claims she does not know how she became one; Gordon (Sterling K. Brown) escapes from jail and goes after Sam.
Sam and Dean investigate a series of murders in which the victims were pulled up through chimneys; Dean wants an old-fashioned Christmas.
Sam and Dean travel to Massachusetts, where they discover a coven of witches that has killed two people; despite warnings, they confront the head witch, who reveals Ruby's past.
Sam and Dean race to Bobby's side after he lapses into a coma; while in that state, he battles personal demons, and the reason he is a hunter becomes clear; when the brothers enter Bobby's dream to save him, they face their own nightmares.
After a tragic shooting while investigating a man's disappearance, Sam awakens to find that he is living the same day over again.
Sam and Dean break into Bela's apartment to get the Colt back, but she has tipped off agent Henrickson regarding their whereabouts, and they are arrested.
Sam and Dean star in a reality show that chronicles the pursuit of the paranormal at an abandoned estate that becomes the most haunted place in America one night a year.
Dean gets a call from his dad, who says he has a way to get Dean out of his deal; Sam doesn't believe that it's John calling and warns Dean not to listen to him.
As time runs out for Dean, Sam convinces him to investigate a possible zombie case; when Bobby discovers where Bela is hiding, Dean leaves Sam behind to confront her.
Thirty hours before Dean's deal with the crossroads demon is up, Sam, Dean and Bobby search for Lilith; in a battle to the death, Sam, Dean and Bobby take on Lilith and all her demons in an attempt to save Dean's life.