Supernatural

In 1983, the Winchesters John, Mary and their two sons Dean and Sam were a regular family living in Lawrence, Kansas but one night a powerful yellow-eyed demon named Azazel killed Mary because she "interrupted him". Over the next 22 years, John raised his boys as hunters, human vigilantes who investigate paranormal activities and hunt down supernatural creatures, entities, and beings, while John looks for the demon who killed Mary and the means to kill it. Dean was always protective of his brother and loyal to his father, but Sam was always resistant to both of them and the hunting life itself, and he eventually left to attend Stanford on a full ride.

In 2005, Sam has retired from hunting to focus on college, but Dean brings him back into that life after their father John goes missing and after Sam comes back from hunting a ghost with Dean, Sam's girlfriend Jessica Moore is killed by Azazel, just like their mother was. The two brothers then embark on hunting quests across the country as they look for John and also work on cases involving other supernatural creatures, from ghosts, to shapeshifters, deities, even vampires and other monsters. Along the way, they discover that Sam has unusual abilities such as telekinesis and visions of the future, which the boys come to think is related to the demon they're hunting. Sam and Dean also face the recurring villain Meg, a demon minion of Azazel.

Eventually, the boys find their father, who has discovered the means to kill Azazel: an old, antique revolver called The Colt, a supernatural firearm weapon created in 1835 by Samuel Colt to kill anything supernatural--but it only has a limited amount of bullets. After finding The Colt, John is forced by Meg to hand it over. He instead uses a fake gun while Sam and Dean attempt to kill Azazel with the real one, but the demon escapes and John is taken hostage, Sam and Dean, with the help of old and close family friend Bobby Singer, find and exorcise Meg from her host, get John's location and find him, but only have two Colt bullets left. Azazel is revealed to be possessing John and announces that he has plans for Sam; he tries to kill Dean, though John re-takes control while Sam shoots him in the leg, forcing Azazel to leave John's body.

As the three Winchesters leave with their war-wounds to re-track Azazel, a demon in a truck rams into the Impala, smashing it and knocking out the family.

The season follows Sam and Dean Winchester as they deal with their father's death and continue to hunt down the yellow-eyed demon known as Azazel, who caused the fire that led to the deaths of their mother over 20 years ago and later, Sam's girlfriend, Jessica Moore. While dealing with cases involving normal supernatural creatures, such as monsters and ghosts, the boys have assistance not only from their friend Bobby, who has now become their surrogate father, but also from new allies Ellen Harvelle (who has a history with John), her daughter Jo, and Ash. Part of Azazel's master plan is eventually revealed as he gathers Sam and others like him, leading to Sam's death. Seeing no other choice, Dean makes a deal with a crossroads demon to resurrect Sam in exchange for his soul, which will be collected in one year. In a final confrontation, in which Dean kills Azazel with The Colt using the last of the original bullets, a gate is opened, releasing hundreds of demons from Hell and Dean is facing the ticking clock until his contract is done.

The season mainly focuses on trying to save Dean Winchester from his deal and tracking down the demons who were released from Hell. Along the way, the brothers meet Ruby, a black-eyed demon who also has an interest in Sam Winchester and claims to be able to help save Dean. Also, they meet Bela Talbot, an acquirer and seller of occult objects, who is constantly a thorn in their side. The brothers eventually learn what demon holds Dean's contract, a white-eyed demonic being of great power named Lilith, the very first and oldest demon in creation. The brothers, along with Ruby, track her down and attempt to kill her. Lilith is unable to stop Sam due to his demonic powers, however. Dean's contract then expires and his soul is taken to Hell.

After spending four long, horrific months in Hell, Dean Winchester is miraculously raised from the Underworld and resurrected by an angel of the Lord God Himself named Castiel, one of several angels who appears throughout the season. After Dean reunites with his father-figure friend Bobby and his brother Sam, the rest of the season follows the brothers, with the help of their friend Bobby, as they work with Castiel and his subordinate and friend Uriel, a fellow angel, to stop Lilith's plan of breaking the 66 Seals to unlock a cage in Hell, which will allow the release of the fallen archangel Lucifer himself, also called the Devil, who was once the favored angel of God but rebelled against Heaven for refusing to serve humans and therefore was cast down and banished.

Along the way, the boys meet a girl named Anna who not only has the ability to hear angels but is also a fallen angel herself. Eventually, angels turn up dead and the angels capture Alastair, Hell's Grand Torturer demon who seems to know Dean well, and they ask Dean to torture him with them assuming its the demons killing the angels, but Alastair, before he dies, says its not the demons. And eventually, Castiel learns that his own brother Uriel turns out to not only be working for Lucifer, but has convinced several loyalist angels to join him and to free Lucifer from his cage. Along the way, Dean learns that he broke the first seal while he was in Hell by being convinced by Alastair to slaughter innocent souls in the Underworld, especially when he reveals to Sam that he wasn't in Hell for four months but instead 40 years. Additionally, the brothers meet a Prophet of the Lord named Chuck.

Sam and Dean's relationship is also strained as Sam starts siding with Ruby over Dean. He also begins to give into his demonic side by drinking demon blood to become strong enough to kill Lilith. After tracking down and killing Lilith, Sam learns her death is actually the final seal and Ruby was deceiving him all along. Dean arrives too late to stop him, but the brothers kill Ruby as Lucifer's cage opens up beneath them and he is released upon the world

Immediately after Sam frees Lucifer from Hell, he and Dean become targets of both Heaven and Hell. They are threats because they are destined to be the respective vessels of Lucifer and the Archangel Michael (the eldest of the archangels and the one responsible for casting Lucifer from Heaven), who will fight in a destined match to determine Earth's future. This would result in the deaths of millions of innocent people who would be in the cross-hairs. If Dean refuses Michael, Lucifer will destroy the human race with the Four Horsemen, the living embodiments of the four plagues, however Sam saying yes to Lucifer will only speed up the Devil's plans. Additionally Bobby is crippled and wheelchair-bound. Faced with no other choice, Sam and Dean team up with their angel ally and friend Castiel to look for a means to defeat both Heaven and Hell whilst battling angels, demons and even archangels.

Their journey pushes the Winchesters' relationship to the breaking point as they both learn how they truly feel about each other and at points agree with Michael and Lucifer. Both from distrust in each other and from not seeing any other choice. They also learn that Michael and Lucifer are a lot alike and what Sam and Dean potentially could be, only further persuading them when Sam and Dean themselves become distant. The boys' journey also leads to the deaths of many of their dear friends such as Ellen and Jo while other old friends such as Anna side against them and the Four Horsemen continue to bring Hell to Earth as the brothers seem to think all hope is lost even after some personal encounters with Lucifer and Michael themselves. Meanwhile, Castiel begins a mission to find God even going as far as to face the archangel Raphael to find him, only to deduce from the angel Joshua, the angel who talks to God, that God won't help. Additionally, the brothers try to kill Lucifer with the Colt, who regain it from a powerful crossroads demon named Crowley, who is also the King of the Crossroads and wants the boys to kill Lucifer, but the they do not succeed. However, the boys eventually gain hope from the Trickster, who is actually the archangel Gabriel (who is the youngest of the archangels and left Heaven because he couldn't take the fighting between his brothers), and who also, after re-gaining his faith in humanity, tells Sam and Dean that the Rings of the Four Horsemen are keys to Lucifer's Cage and that the brothers can trap Lucifer. So Sam, Dean, Castiel, Bobby, and Crowley (who restores Bobby's legs) all go after the rings and after gaining them, Sam willingly decides to let Lucifer possess him to he can take back control, open the cage, and fall in.

In the season finale, their plan falters and Lucifer fully possesses Sam while Michael meets him on the battlefield. As the brothers talk, Lucifer tries to convince Michael to have them both "walk off the chess board" but Michael won't listen and decides to have an altercation with Lucifer. Dean, after finding the battlefield with help from Chuck the prophet, rides onto the field with the Impala in a desperate attempt to get through to Sam but Lucifer instead beats Dean to a pulp as he explodes Castiel and snaps Bobby's neck but in the end the Winchesters' love proves more powerful than Lucifer's rage and Sam re-takes control, opens the cage door and falls in bringing, Lucifer, Michael, and Adam into it with him. A resurrected Castiel, who is now more powerful than before, then heals Dean, brings back Bobby and the trio part their separate ways. While Castiel returns to Heaven to possibly try and rule it and Bobby resumes hunting, Dean, on Sam's insistence, goes to Lisa and retires from killing monsters and begins a new and normal life away from hunting to be with her. That same night, however, Sam appears outside their house mysteriously.

The sixth season begins about a year after the end happenings of the fifth with Dean living a normal life with Lisa Braeden and her son Ben. Sam mysteriously and miraculously returns to Earth and reunites with Dean, who leaves his new life behind. Sam has been working with their grandfather, Samuel Campbell (their mother's father), in order to capture the Alpha monsters (first of the gene pool). Bobby eventually gets his soul back from the crossroads demon Crowley, who has apparently become the King of Hell. It is eventually discovered that Samuel is following Crowley's orders in exchange for the resurrection of his daughter, Sam and Dean's mother. Castiel is barely helpful anymore because a civil war in Heaven against the archangel Raphael (who wants to take over Heaven, free both Michael and Lucifer from the Cage, and start the Apocalypse again) has taken its toll. Crowley wants to use the Alpha Monsters to locate Purgatory, a supernatural realm that is filled with the souls of every monster that has ever been killed (vampires, werewolves, wendigos, skinwalkers, even shapeshifters etc.) and in which there are a vast collection of souls that could be used for power. Castiel brought back Sam without his soul, and Dean implores the help of the Horseman Death in order to retrieve it. Death puts a wall up in Sam's mind so that he will not remember Hell. Sam's original personality is restored with no memory of the past year and a half. It turns out Castiel made a deal with Crowley for both of them to receive half of the souls in Purgatory. Dean doesn't like the idea and tries to stop the duo. To stop the Winchesters and Bobby Singer, Castiel knocks down the mental barrier in Sam's mind. Castiel betrays Crowley, who then allies himself with Raphael and performs the ritual to open the doors of Purgatory. It fails because they had fake dog's blood and Castiel appears full of power from having done the ritual himself. He obliterates Raphael and Crowley escapes. When the Winchesters try to reason with Castiel, he reveals that he is not an angel anymore, he has become the new God.

In season seven, the events take place right after the angel Castiel absorbed the souls of Purgatory declares himself as the new God. And the "mutated angel" goes around the planet to try and finish his "work". Eventually, thanks to a little bit of help from the Horseman Death, the Winchesters convince the angel to return all the souls back to Purgatory. Castiel manages to return all souls but souls of some of the older creatures. Something in which the Winchesters will find themselves in an increasingly sinister, changing landscape, as they go up against this new foe, which is unlike anything they've ever fought before: the Leviathans, the very first beasts created by God, but were then locked away in Purgatory for being too destructive. The brothers will find their old tricks, weapons and hiding places all rendered useless. All they'll have is each other with the certainty that, like the last of the cowboy outlaws, whatever they face, they're not going down without a fight.

Season seven finds Dean and Sam reeling from the loss of Bobby and without the help of Castiel. Sam's violent memories of Hell threaten to overtake him, threatening not just his life, but his brother's as well. Dean struggles under the weight of a secret that threatens to tear them apart. They are about to face an enemy more cunning and adaptable than any they've ever fought. As the landscape around them becomes increasingly treacherous, the tools they've come to rely upon will be stripped away. Our heroes, like so many outlaws before them, will find themselves utterly outmatched and outgunned and pushed to their limits, with no one to rely on but each other.

As the season progresses the Leviathans become a much greater threat where Sam and Dean are forced to form an alliance with a resurrected Castiel, Meg, Crowley, a ghostly Bobby Singer and the prophet Kevin Tran to defeat the Leviathans and their leader Dick Roman with a weapon designed by God. Bobby begins to turn into a vengeful spirit forcing Sam and Dean to destroy him. Dean manages to kill Dick but the after effects cause him and Castiel to end up in Purgatory while Crowley abducts Meg and Kevin. With Bobby dead, Sam is completely alone...

One year after the defeat of the Leviathans, Dean escapes Purgatory, with a vampire-comrade-in-arms named Benny, and reunites with Sam who has retired from hunting much to Dean's anger. Not long after Dean discovers that Kevin had escaped Crowley's abduction months ago which Sam was unaware of. Kevin reveals that he stole another Word of God from Crowley about Demons and discovered the means of closing Hell forever with all demons inside. Now reunited Sam and Dean embark on their monster hunts while Kevin continues to translate the tablet to stop Crowley and his plotting.

Sam and Dean's relationship is challenged as Sam stopped hunting for a year which he claims is because he had no one to force him anymore with Dean and Castiel gone, Bobby dead and Kevin and Meg missing. Dean, however, remains in contact with Benny, who is trying to live without killing but is missing Purgatory but Sam becomes angry that Dean would let a vampire live.

The season also features flashbacks in both Sam and Dean's past year on Earth and Purgatory. For Dean he constantly fought monsters everyday for a year in Purgatory until Benny saved him and told him of a portal which could transport humans out. Dean and Benny find Castiel and the three fight past Leviathans to make it to the portal but Castiel refuses to leave. As for Sam, he retired from hunting and met a woman named Amelia and lived a normal life with her. However, once she discovers that her husband, a soldier presumed KIA, was still alive, Sam left to allow her to reunite with him. Eventually Castiel returns, freed from Purgatory by the mysterious but powerful angel Naomi, who has apparently taken control of Heaven and puts Castiel under her control to spy on the Winchesters for her own motives. Meanwhile, Amelia returns to Sam to re-connect but Sam pushes her away for good while Benny helps Dean by dying and returning to Purgatory to help Sam and Bobby pass through Purgatory to Earth and subsequently chooses to stay there.

Kevin eventually learns the three trials for sealing Hell from the Demon Tablet: kill a Hellhound and bathe in its blood, free a soul from Hell (who turns out to be Bobby) wrongfully imprisoned, and finally cure a demon who they choose to use on Crowley. However, the Winchesters and Castiel learn from Meg, before she is killed by Crowley, of the Angel Tablet which Naomi tries to have Castiel steal for her own uses but he resists and flees from everyone. Additionally, Sam and Dean encounter their grandfather Henry and a powerful demon named Abaddon who is a Knight of Hell, among the oldest and most powerful demons. While Henry is killed and Abaddon is decommissioned, the brothers lean of a bunker belonging to the Men of Letters, the collectors of information on the supernatural who entrust a few hunters to handle the most powerful monsters. In the midst of the trials, Sam and Dean encounter an angel named Metatron, the Scribe of God and the creator of the tablets who then reveals the nature of the angel tablet to Castiel: to seal Heaven and its angels and works with Castiel to fulfill this mission. Meanwhile, after Crowley begins killing Sam and Dean's old friends, they decide to give in.

In the season finale, Sam and Dean manage to capture Crowley to use him as the last trial and cure him while Naomi continues looking for Castiel and captures Metatron, forcing Castiel to work with Dean to finish the angel trials. Meanwhile, Sam is interrupted by Abaddon but fends her off as Crowley begins to show signs of humanity. Naomi realizes that Metatron is not planning to seal Heaven but is planning to break Heaven and cause the angels to fall and that if Sam completes the final trial, he will die as God wanted. Dean returns to Sam and in an emotional breakdown they make up for their years of mistakes but Sam passes out while Metatron betrays Castiel and takes his grace, turning him human. Moments later the angels of Heaven fall all across the Earth as Sam, Dean, Kevin, Castiel, and Crowley are forced to watch helplessly.

Immediately after the fall of the angels caused by the angel Metatron, the Scribe of God, Sam falls into a coma from the effects of the trials to close the gates of Hell and almost dies. With Castiel unable to help (having lost his grace), Dean seeks the aid of another angel named Ezekiel, whose only option to save Sam from his wounds is to possess him. Dean accepts, and helps Ezekiel trick Sam into giving his consent against his knowledge. The three of them, with Kevin (and Crowley as their prisoner), work to find a means to put the angels back in Heaven and are also forced to deal with Knight of Hell, Abaddon, who is attempting to seize control of Hell in Crowley's absence and enforce her reign of Hell on earth. Also a newly human Castiel must continue to run from the thousands of angels who blame him for their setbacks including many of whom are now lead by Bartholomew and Malachi seeking to restore themselves back to Heaven under their respective leadership's. Sam and Dean (with the help of Ezekiel) deal with regular hunting cases with help from old friends such as Charlie and Jody, but over time Sam begins to notice that something isn't right with him which Dean wants to tell Sam about but Ezekiel insists that his presence must remain secret. Eventually, Metatron returns to Earth and Ezekiel is revealed to actually be the angel Gadreel, the former protector of the Garden of Eden picked by God to protect the Garden but failed by letting Lucifer into the Garden and was then punished by being locked away in Heaven's darkest dungeon. Metatron makes a deal with Gadreel to rebuild Heaven together by allowing certain angels to return which Gadreel, seeking to redeem himself accepts. Dean discovers Gadreel's deception and tries to warn Sam, but Gadreel takes full control and kills Kevin. Meanwhile, Castiel reclaims his powers by stealing the grace of another angel. Dean and Castiel team up with Crowley to expel Gadreel from Sam's body, but are forced to let the King of Hell go in exchange for his help.

Sam is furious at Dean's deception, and their relationship becomes strained as they struggle to deal with Kevin's death. While Sam is still at the Bunker and Castiel starts a mission to find Metatron on his own and stay clear of Bartholomew, who eventually finds him and tries to convince Castiel to join him, Dean then teams up with Crowley in his hunt for Abaddon to find the only weapons that can kill a Knight of Hell, the First Blade and the Mark of Cain. Both of which Dean acquires from Cain himself, the first born son of Adam and Eve, who killed his brother Abel and became the original Knight of Hell as well as the trainer and creator of the rest of the Knights, including Abaddon. Sam helps Castiel look for Gadreel, while Castiel comes face to face with Bartholomew who wants him to join his faction of followers hunting for Metatron. Castiel disagrees with Bartholomew's ruthless methods and kills him in self-defense, causing a number of angels to ask Castiel to lead them (much to his chagrin). Dean eventually finds Abaddon and kills her, but the Mark of Cain begins to affect him, bestowing him with great strength, but also a painful desire to kill. Meanwhile, Metatron continues to play God with the power of the angel tablet and starts enacting public miracles to become a deity to mankind and they begin to slaughter and praise in Metatron's name. Gadreel grows tired of Metatron's lies and defects, teaming up with Castiel to try and stop him.

In the season finale, Sam and Castiel worry about the Mark's influence on Dean, but eventually realize that he's their best shot at defeating Metatron. Castiel and Gadreel try to infiltrate Heaven to destroy the angel tablet and cut off Metatron's power, allowing Dean to kill the angel, but they are caught and put in Heaven's dungeon. Gadreel is forced to sacrifice himself as part of a spell to free Castiel. Meanwhile, Sam arrives too late to stop Metatron from stabbing Dean through the heart and his brother dies in his arms. Castiel manages to trick Metatron and take back Heaven, but chooses to spare his life and locks him in Heaven's dungeon though is dying from his draining grace. Sam tries to summon Crowley to fix Dean, but instead Crowley shows up in the bunker of his own choice where Dean's body has been placed and puts the First Blade back into his hands, which revives Dean as a demon.

The season begins with Sam's frantic search for his missing brother, who is gone without a trace. The road to recovering the wayward Dean takes Sam down dark paths, with consequences that will shake the boys to their core. Along the way, Sam encounters a former US marine named Cole Trenton, who apparently knows Dean and wants revenge for Dean killing his father. Meanwhile, Castiel, with the aid of Hannah, has to pick up the pieces in the aftermath of Metatron's campaign. But with his grace failing and rogue angels still on the loose, Cass faces the ticking clock of his own mortality. After Sam learns that Dean is a demon, because of Crowley and the Mark of Cain, Sam eventually finds him, with help from Crowley, but so does Cole. While Dean and Cole meet and duke it out, Dean overpowers Cole and nearly kills him. But Sam manages to trap Dean with holy water and handcuffs carved with devils-trap symbols.

After giving Crowley the First Blade, Sam takes Dean back to the Men of Letters bunker to cure him. Castiel and Hannah are on the way to help but are delayed because of a rogue angel who injures Cass and tortures Hannah until Crowley shows and takes the grace of the angel and gives it to Cass. As Sam continues to cure Dean, he eventually escapes the devil's trap and tries to kill Sam but Castiel arrives, overpowers Dean and they continue curing him until he is finally human. As the season progresses, all-new threats emerge to once again push all of our heroes to their limits.

One such threat is the appearance of a very powerful witch named Rowena, who also turns out to be Crowley's mother and has the power to kill demons. He captures her, but she convinces him to let her live in his lair so they can reunite and be a family again. Meanwhile, while Castiel and Hannah still take care of the rogue angels, Sam and Dean work normal, everyday cases: dealing with not just demons but also ghosts, monsters (vampires, werewolves, and shapeshifters), deities, and again with angels. They also help out their friend sheriff Jody Mills. However, Dean is suffering from the effects of the Mark and Sam and Castiel desperately try to help him and find a cure, or at the very least, a way to get rid of it, even going as far as to torture Metatron.

Eventually, the Winchesters' friend Charlie returns from Oz as well and after combining her with her alter-ego, which she created from the Wizard of Oz to win the war in Oz, she agrees to help the boys find a cure for the Mark, but Dean is starting to give up and live with it. Hannah eventually abandons her mission with Cass and returns to Heaven. Later on, another one of those threats is the original bearer of the Mark, Cain himself, who has fallen under its influence as well and has started killing his descendants to rid the world of his tainted bloodline, which was stained the moment he killed his brother, Abel. After trapping him in a Devil's trap, Dean and Cain square off in a barn and Dean defeats him, stabbing him with the First Blade, while Sam, Castiel, and Crowley wait for him.

Dean has given up on finding a cure, but Sam still continues to search, going behind Dean's back and convincing Castiel to come see a psychic to contact the boy's surrogate father, Bobby, in Heaven, in order to get Metatron on Earth. After Sam and Castiel remove Metatron's grace, he reveals that he doesn't know how to remove the Mark, but he mentions that Castiel's grace still remains and takes him to it. However, Metatron finds and takes the Demon tablet but not before Cass manages to get his grace back and returns to his status as a Seraph. Sometime after, Charlie contacts the brothers about a possible way to remove the Mark with a book called the Book of the Damned, a very powerful dark magic book that was in possession of the Styne Family, an ancient family that was the inspiration for Mary Shelley's Frankenstein and has consisted entirely of magic practitioners mixed with vastly superior surgical skills for multiple generations.

Sam calls upon Rowena, Castiel, Charlie, and Crowley to read the book and find a way to remove the Mark. However, one of the Styne members kills Charlie and Dean becomes hell-bent on revenge, giving in to the Mark. After the Styne family captures Dean, Dean falls under the Mark's influence, kills the entire Styne family, savagely beats and almost kills Castiel when he tried to stop Dean, and disappears. He heads to a Mexican restaurant and summons Death, the Pale Horseman himself, to kill him. However Death reveals that the Mark not only makes Dean unkillable, thus even he can't kill Dean, he also tells Dean that if he even removes the Mark without passing it along to another host, it will unleash the Darkness, a powerful and destructive primordial force that predates the Earth, the Universe, the Archangels, and even God. He also tells Dean that after God and the Archangels fought the Darkness in a horrifying war, God created the Mark of Cain to lock away the Darkness, and sealed it away using the Mark, which was originally borne by Lucifer himself. The Mark revealed itself as a curse after corrupting Lucifer as he became jealous of humans, who was banished to Hell for his crimes against humans and God. Lucifer passed the Mark on to Cain before his imprisonment in his Cage, who then transferred it to Dean.
Death tells Dean that he can send Dean somewhere else so that the Darkness remains sealed and the Mark remains intact on a host, but he has to kill Sam. After Sam and Dean fight, Dean is ready to kill Sam with Death's Scythe, but ironically, Dean kills Death at the last second due to his love for his brother. After that, the Mark is removed from Dean's arm, thanks to the spell from the Book of the Damned cast by Rowena, who later pins Castiel and Crowley and puts Castiel under her attack dog spell so he will kill Crowley. Elsewhere, the Darkness is released.

Following the release of the Darkness, the season follows the Winchesters and their allies as they find themselves fighting the most powerful supernatural entity they have ever faced, unlike anything else they have ever gone up against before.

Immediately after its release, and tipping over the Impala, Sam sees that Dean is gone and goes to look for him, finding him in a field where Dean had a conversation with the Darkness, which apparently turns out to be, or at least, takes the form of a woman in a black dress. Dean says that she thanked him for setting her free.

Meanwhile, Castiel is still suffering from the dog attack spell the witch Rowena put him under and starts to attack others. He also remembers that when he attacked Crowley, the King of Hell escaped from his current vessel and into another one. He then orders his demon minions to get rid of the spell holding his vessel in place.

As Sam and Dean drive away from the old diner, they find a Sheriff's deputy named Jenna Nickerson and head to a hospital to help others. Upon arriving there, they find people with black veins which Dean calls Rabids, people who have been forced to let their inner darkness out. This being an effect of the release of the Darkness. They also find a human baby in the mix named Amara. Meanwhile, as a manhunt for him begins, Castiel prays to the angels, begging them to help him from hurting others and is willing to take whatever punishment they bring him.

As Dean, Jenna, and the baby make it out of the hospital, Sam using himself as a diversion gets infected and starts to sprout black veins. Eventually, after he prays to God for help, he encounters a Reaper named Billie who is apparently disappointed that Death is dead and says that the next time Sam and Dean are killed, she will ensure that they stay dead and even that she will toss them into the Empty, a place no soul nor entity nor being can escape from. As the angels find Cass, they start to torture him and after Hannah arrives, she explains that alarms are going off in Heaven. He implies that those alarms are for the release of the Darkness. As the tortures continue, Castiel escapes and Hannah dies trying to save him. Crowley manages to get back in his vessel and his subordinates reveal that the Darkness is free, especially that when Michael and Lucifer themselves apparently shouted throughout Hell from the Cage.

Dean and Jenna go to her grandmothers house and when they realize Amara is levitating objects, she calls Dean and her grandmother calls an exorcist, who turns out to be Crowley impersonating a priest. However, back at the hospital, Sam finds a cure for the "Rabids": Holy Fire. And he makes a ring of holy fire and cures a few others as well. The baby turns out to be Amara as a child as Dean finds the Mark of Cain on her. Amara sucks out Jenna's soul and she becomes soulless, like how Sam once was. After Crowley kills Jenna, Dean attacks him as he plans to take the baby, but fails as the baby walks out and quickly grows up. Sam and Dean eventually reunite and find Cass at the bunker, while Crowley finds Amara and takes her to Hell as an offering.

The Winchesters look for ways to find and stop the Darkness, but first they search for Rowena to undo the spell on Cass. They find her and she does so, but she escapes. At Crowley's Lair, Crowley becomes Amara's "uncle" and her appetite grows and she starts to feed on demons. Eventually, Sam reveals to Dean that he has been having visions about a being he describes as the opposite of the Darkness, which he thinks is God himself.

While Sam and Dean work on ordinary cases involving ghosts, monsters, and even along the way Imaginary Friends, the brothers and Cass also start searching for ways to defeat the Darkness. Even after finding Amara where Crowley is keeping her, Dean doesn't appear to strike at her and he fails and she escapes. Meanwhile, at the place, Sam's visions start to become more revealing, as he starts to have visions of Lucifer's Cage. Castiel eventually finds Metatron, who has started a business of catching what he calls reality but is also miserable about his current status. After beating and throwing him, Castiel askes Metatron what he knows about the Darkness, considering he was God's scribe. Metatron reveals that in order to created the Earth, Heaven, even the entire Universe, in order to start creation itself for that matter, God didn't only imprison the Darkness, but he had to betray and sacrifice her and Metatron says that the Darkness is the only thing God's really ever known, his only kin...his older sister.

Although Dean hates the idea, they intend to go the Limbo, the deepest place in Hell, and speak to Lucifer about the Darkness. They enlist the help of Rowena to summon him. And when Dean goes to find Amara at a church where she attacks people, Sam awaits outside of a supernatural cage in Limbo surrounded by powerful fire and covered in enochian sigils, and eventually, Lucifer himself appears in the cage, manifested as his original vessel, Nick. He and Sam talk about the Darkness and how to stop her while Amara and Dean talk about her issue with her brother. After three angels find her and try to attack her, she kills them all and summon a powerful smiting attack that knocks her out. In Hell, Lucifer says that he will help them stop her, but only if he possesses Sam and returns to Earth. Sam says no and Lucifer extinguishes the fire, erases the warding, and summons Sam in the cage and still tries to make him say yes, especially when he reveals that it wasn't God who sent Sam the visions, but it was Lucifer. When the Darkness was set free, it damaged the cage and allowed Lucifer to reach out to Sam. Though Sam strongly considers, he still says no and Lucifer starts to attack him.

Rowena reveals that Lucifer came to her in a dream and said he needed her help to get Sam to him and she would join him. But, after Cass finds Amara, having survived the attack, she summons him to Dean with a messages and eventually, as Rowena conjures the spell to banish Lucifer, Dean and Cass head down to the cage and help Sam survive in a fight against Lucifer. As Lucifer also kills Cass, Lucifer is banished by Rowena. After leaving Hell, Cass apparently stays and reveals the before Lucifer could be banished back to the Cage, Cass said yes to him and Lucifer possessed him. After freeing and then killing Rowena, Lucifer takes back Hell and makes Crowley his slave, calling him "Puppy".

Meanwhile, Sam and Dean eventually find possible ways to defeat Amara, using Hands of God, powerful objects said to contain the power of God himself. Even after finding one, Sam, Dean, Rowena, and Crowley try to get Lucifer out of Castiel's body but it fails and he absorbs the power of the Hand of God and uses it on Amara, but it fails and he is taken against this will by Amara. And she starts to torture him to draw out God. And as fate would have it, eventually, God himself finally returns. After having a conversation with Metatron and reconciling with Lucifer, he decides to help stop her. And though his original plan of weakening her with Witches, Demons, and Angels and trying to imprison her again using the Mark fails, Amara fatally attacks God(Chuck),causing him to start dying.

Although they think Amara seems impossible to destroy, God tells Sam, Dean, Cass, Crowley and Rowena that she does have one weakness: Light with the power of 10,000 suns. So they collect souls to build a bomb. And Dean is the one to bear it. After talking with Amara, whom starts to feel bad about attacking and nearly killing her brother Chuck, Dean convinces her to forgive him. So she summons him to a garden area and the two reconcile and decide to go off together for a while. However, Amara leaves Dean with a thank you gift and he finds his mother alive and resurrected. However the the bunker awaits a British woman who banishes Cass with a banishing sigil and shoots Sam, leaving his fate unknown.

SUPERNATURAL
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