The Winchesters team up with two other hunters to take on the chitters, cicada spirits who possess humans so that they can reproduce.
While the Castiel-possessing Lucifer tries to take control of Heaven, Sam and Dean hear out Crowley on his plan to stop Amara.
Sam and Dean take on a pair of werewolves... and one of them manages to kill Sam. When Dean gets back to civilization, he kills himself in a desperate attempt to ge a Reaper's attention and make a deal to bring Sam back to life.moreless
The new owners of a house accidentally break a seal, unleashing a creature that Bobby and Rufus trapped several years ago. Now Sam and Dean are working the same case, and have to save a new wave of coma victims before their bodies wither and die.moreless
Conclusion. A video wire elicits admissions, as seven murders are tied together and suspects are narrowed down to three, in the Season 4 finale. Also: Mark Hickman faces the truth about his past; and Provenza and Patrice resolve wedding issues.moreless
Part 4 of 5. The team continues to gather information about the past murders and how they tie in with the present ones. Meanwhile, Lt. Cooper and Amy find themselves in an unexpected gunfight.moreless
In the premiere, Maine politician Claire Warren's presumed-dead son Adam returns home a decade after he disappeared; and while he's welcomed with a mixture of joy and astonishment, he's also met with suspicion, as some doubt that he is who he says he is. Adam's reappearance also reverberates beyond the family: the neighbor convicted of his murder must be freed.moreless
Part 3 of 5. Sharon sharpens attention on a former LAPD detective after another victim is found. Meanwhile, a potential gang war erupts with three more murders, and Tao unearths intriguing information about a notorious lawyer.moreless
Sam and Dean decide to take a break and check out a wrestling tour. However, when a wrestler turns up dead, the brothers suspect demonic influence. Meanwhile, Crowley escapes from Hell with a little help from a friend and seeks out a weapon to kill Lucifer.moreless
Part 2 of 5. A startling discovery is made in a church. Meanwhile, Stephanie and Sanchez bond over lost loved ones; Rusty discovers that his biological mother's ex is an on-the-run fugitive; and Tao is pushed too far by an old partner.moreless
Sam locates an artifact capable of destroying Amara... that was lost at sea in 1943. The brothers convince Castiel--secretly Lucifer--to transport Dean back in time to recover the artifact.
Young mother with her 3 year old son is shot and killed in gang territory. The investigation leads Major Crimes to the unsolved murders of a police officer, DDA and her bodyguard.
A babysitter turns up dead on Valentine's Day, her heart ripped out, and the Winchesters soon discover that she was the victim of an Aramiac curse.
Sam and Dean meet with Jody and the two girls that she's housing: Alex and Claire. Claire has asked the brothers to help her investigate a series of recent disappearances, but Jody insists that there's nothing to them.moreless
The Winchesters investigate two deaths at a retirement home, where the victims bashed their skulls in because of an intolerable screeching noise. They soon discover that the deaths are connected two deaths that occurred in Ireland 30 years ago. Meanwhile, Lucifer explores the world that he's been reborn into.moreless
While Lucifer tries to convince Sam to let him out of the cage, Dean and Crowley come up with a plan to seal the Devil away permanently. Meanwhile, Castiel joins forces with another angel to confirm if Amara is dead or not.moreless
A deranged killer makes his own film and his victims are the stars. Also, a new romance blooms.
Alex turns to John for help when the Countess gives her an ultimatum concerning the children. Meanwhile, Liz and Iris decide to exit the Cortez in style, while Donavan decides to convince the Countess to love him... or kill him.moreless
A professional baseball player's daughter vanishes. Meanwhile, Slider approaches the final phase of his trial as Rusty is put in an awkward position.
While Dean tries to find Amara, Sam and Crowley convince Rowena to help them summon Lucifer from the cage so that Sam can try and persuade the Prince of Darkness to help them seal the Darkness away once more.moreless
The Countess plans to kill Will to obtain his money, while Ramona plans revenge on the woman who loved and left her.
The murder of a fugitive diamond thief is investigated. Meanwhile, Flynn goes on desk duty while recovering from injuries, and Rusty's relationship with Slider is uncovered by Marianna's brother.
Sam is forced to relive his childhood when his imaginary friend Sully appears... and asks him to help solve the murder of another imaginary friend.
John discovers the true identity of the Ten Commandment Killer and tells his former partner Hahn who the murderer is.
A young man is pushed off the top of a parking structure. Mysteries deepen when it's discovered the victim lived in a luxury apartment without any visible means of support. Meanwhile, Flynn tangles with an overly cheery physical therapist.moreless
Flynn faces a medical emergency as Thanksgiving draws near. The team investigates a road rage incident that may have lead to murder.
In 1925, the Countess meets her first love... and her husband James. Meanwhile, John has himself committed to confront the Ten Commandment Killer, and construction workers find a sealed wing of the Cortez.moreless
Sam and Dean team up with Sheriff Donna to stop a ghostly killer who possesses people who wear costumes.
A murder during the taping of a reality show is investigated by the team in a case that personally impacts Sanchez. Meanwhile, Rusty meets Slider's lawyer.
While Iris, Ramona, and Donovan plan their revenge against the Countess, she sends Alex to find her missing child. Meanwhile, Liz finds the love of her life, and John finds an unexpected intruder in his home.moreless