A warehouse is a location where goods or merchandises are often stored before being distributed or sold. Some are known to become abandoned and thus become home to other beings, usually as a hideout or a base of operation.
John goes to meet Meg at a warehouse in Lincoln, Nebraska. Meg demands he hand over The Colt, and she has her brother Tom test it. When Tom proves the gun they are given is a fake, the two attempt to pursue John as he makes a run for it. He stops them by covering his path with holy water.
Dean discovers a djinn using an abandoned, partially ruined warehouse as its base of operation, or nest. He is captured and forced into a fantasy world by it. Sam arrives just in time to rescue Dean and together they rescue the djinn's other victim.
Castiel and Uriel bind the demon Alastair inside an abandoned warehouse, and send Dean to torture information out of him. However, Alastair escapes and attacks both Dean and Castiel, until Sam arrives and kills the demon. Uriel is revealed to be a traitor and a showdown between him and Castiel ensues. Castiel is saved by the timely arrival of Anna, who kills Uriel.
Demons kidnap Claire Novak and tie her up inside an abandoned warehouse. The Winchesters and Jimmy locate them but also get captured. Castiel arrives and takes possession of Claire in time to help defeat the demons. It is here that Dean and Castiel discover Sam's consumption of demon blood.
Dean and Sam arrive at a warehouse and are pulled into an array of TV universes. They manage to escape by figuring out that the Trickster is an angel. They trap him in a ring of holy fire, compelling the Trickster to free them from the illusion. He also summons Castiel back from an unknown dimension. Although the brothers free him from the holy fire, they choose to abandon him there to mull over his own thoughts.
Sam, Castiel and Bobby Singer raid Niveus distribution warehouse to prevent the spread of the Croatoan Virus.
Rachel summons Castiel to a warehouse to confirm whether or not the rumors are true that Castiel is making dangerous side deals behind everyone's backs. When he does confirm it, Rachel attacks him, forcing Castiel to kill her in self-defense.
Lisa and Ben Braeden are kidnapped by demons. Dean locates the pair at an abandoned warehouse, however, Lisa is possessed by a demon and Dean is forced to fight her off to save Ben. The demon mortally wounds Lisa, but this doesn't prevent Dean from exorcising the demon.
Sam's hallucination of Lucifer tricks him into entering an abandoned warehouse. Lucifer taunts Sam and makes him fire the gun randomly. Dean arrives soon after and convinces Sam on what's real and what is not.
Upon locating Gadreel, Dean, Castiel and Crowley tie him to a chair inside an abandoned warehouse, where they intend to expel him from Sam's body. They are successful, but the place is soon raided by Abaddon and her followers. Dean, Castiel and Sam flee, while Crowley stays behind to greet her.
The angels Efram and Jonah take Castiel to an abandoned warehouse where they begin torturing him for the whereabouts of Metatron. Castiel is unable to provide an answer since he doesn't know. Eventually, Hannah arrives and pretends to participate, but eventually intervenes on the torture, forcing Efram to kill her. Castiel, still under the Attack Dog Spell, breaks free from his bounds and kills the other two angels.
Under the influence of the Attack Dog Spell, Castiel runs off to another abandoned warehouse and tries to strangle a woman to death. Dean stops him in time while Sam forces Rowena to remove the spell by holding her at gun point.
Vampires Henry and Richard Beesome capture Claire, Jody and Alex and trap them in an old, abandoned building (presumably a warehouse). Here, Richard reveals his plan to take revenge on Alex for her past actions but the two are intercepted by the arrival of Sam and Dean Winchester.
God summons his newly-formed team to an empty warehouse, where they discuss their plans and await for Amara to arrive. The team consists of Sam, Dean, Crowley, Lucifer and Rowena. Amara arrives at Rowena's beckoning, and the team launch their attack. Amara wanders in to the warehouse gravelly wounded, and for the first time in eons, she meets her brother again. God plans to lock her away, but Amara strikes back in fury and leaves him in a near-dead state. Lucifer is also banished from his vessel by her.
After rescuing Kelly Kline from two hostile angels, Princess of Hell Dagon takes Kelly to a warehouse where she reveals her belief that Kelly's child, who is in fact a boy, will one day save the world. Dagon offers to protect Kelly from then on, and the two leave the area.
Dagon is revealed to have ordered her subordinate, Dermott Culp, to burn down the warehouse she took Kelly to. The fire attracts the attention of Eileen Leahy, who begins pursuing Dermott. Eileen manages to find out more about Dagon after attacking and killing the demon.