Changes

Meanwhile, the brothers are looking for the bone of a righteous person and, while driving, catch a report on the radio about Dick being at SucroCorp. They Following a joking idea from Dean, they break into a mausoleum full of nuns bodies nunery crypt and find one a nun that they think fits the bill of being a righteous person and start to remove her bones from her crypt. Back at Dick's office, he and Crowley finish going over their contract and sign it.

Sam and Dean go back to the cabin and perform a ritual to summon Crowley there. However, he does not arrive. Meg shows up instead, along with Castiel. Dean goes outside where Cass Cas is waiting and tries to talk with him, but he starts to speak about testing on animals. He finally snaps out of it and informs the brothers that the angels in his garrison have been wiped out and that Kevin Tran is missing. Just then, Crowley teleports in and, after threatening Cass Cas and Meg and realizing that Cass Cas is now insane, gives Sam and Dean a vial filled with blood. They ask why he came late and he responds that Dick captured him and made him a deal. He insists, however, that he lied to Dick about accepting his offer and that the blood in the vial really is his. He then goes away, but not before promising to get Meg after all is said and done. He also informs them that Castiel could be very helpful in killing Dick, but Castiel denies knowledge of what Crowley is talking about.

Bobby, in the meantime, has bought a machete and tries to steal a truck, while still in Louise's body. He accidentally touches some iron and is pushed out of the maid's body, but repossesses her when he spots a newspaper article about Dick and becomes enraged again. At SucroCorp, Dick tells Susan to fetch "the arm" from a freezer and Kevin tries to get out of the room that he's been locked up in. A leviathan Leviathan lab tech brings a young girl in and orders her to have a seat. She introduces herself as Polly to Kevin, but otherwise remains silent, under the influence of the leviathanLeviathan-tainted corn syrup.

The Winchesters finally mix the three bloods of the fallen and pour the mixture onto the nun's bone they stole. Nothing happens and they realize they have no way of knowing for sure whether it will work or not. Cass Cas returns with ham sandwhiches for the brothers, careful not have used use ingredients poisoned by the levaithanLevaithan, and insists that he cannot go with them to kill Dick.

Susan brings Dick a case and informs him that the "delegates" are on their way. He then opens the case and takes out a severed arm...belonging to the real Richard Roman. Dick and Susan go to greet the delegates while Kevin starts picking the lock on the door with a pin. He gets out, then notices Dick and the delegates having a meeting. Dick explains to his fellow leviathans, Leviathans his plan to take over the entire U.S. and has the lab tech bring in Polly. He demonstrates a new dairy creamer additive he's created that kills skinny humans, whose trait of being thin is not prefered by levaithan Levaithan for food. It also breeds out other undesirable traits. It's injected into Polly, who throws up and dies. Kevin heads towards the exit, but before he can escape, he is re-captured by Susan.

Outside, Dean and Sam hack into the surveillance cameras using a trick they learned from [[Charlie Bradbury]]. They spot Dick on the camera in the conference room still talking to the delegates. Then they check another camera and see Dick in another office. When they check a third camera, they Dick walking in a hallway. He's everywhere! They realize that he has had a bunch of Leviathans take his form to confuse them. All of a sudden, Louise arrives in a pick-up truck and Sam recalls that she's the maid at the motel they stayed at near the Alpha Vampire's lair. He figures that it's Bobby and goes after him. Bobby tries to kill Sam by choking him, but sees his reflection in a window and stops himself. He disappears and the brothers take Louise to a hospital.

Back at Rufus's cabin, Meg criticizes them for not taking care of Dick and Sam explains that more leviathans Leviathans morphed into Dick's form in order to protect the original. Cass Cas once again says he can't help them and Dean gets angry at him, telling him to clean up his mess. Cass Cas teleports away, then comes back with a game of twisterTwister. Meg points out that, since Cass Cas was the leviathansLeviathans' original vessel, he can tell which of them is the "real fake Dick Roman." That night, Bobby reappears and requests that they burn his flask to prevent him from becoming a vengeful spirit completely. He doesn't want to get anyone hurt anymore and advises them not to stay behind when it's their time to go. Dean tosses the flask into a small fire where it begins to melt. Bobby vanishes and Dean asks Castiel for one last favor. He teleports himself and Dean to the place where they've stashed the [[impalaImpala]]. Cass Cas tells Dean that he is cursed and might screw up again if he goes after Dick with them. Dean responds that he would rather have him than not and forgives Cass for what he did. Cass Cas agrees to help them after all and asks Dean what their plan is.

The next day, as a distraction, Meg drives the impala Impala to the SucroCorp HQ and crashes through the front gate and into a sign. She gets out and starts slaying the leviathan Leviathan guards with borax and a machete. Meanwhile, Cass Cas and the brothers sneak into the building and search for Dick. Back outside, Meg gets jumped by two demons who say Crowley wants to see her now. Sam manages to find and free Kevin, who states that they should blow up the levaithansLevaithans' lab and their food additives.

In the lab, Dean and Cass Cas finally locate Roman. Dean decapitates the lab tech and Cass after Dick taunts the two, Cas attacks Dickhim, who but he just grabs him Cas and throws him aside while Dean stabs Dick through the heart with the bonewhen he turns back to face him. But it However, the bone doesn't work! . Dick pulls it out, thinking they've failed, but Cass Cas grabs him from behind and Dean stabs him, again, in the neck with another bone - the real one this time. The first bone was used to catch him off-guard. Sam and Kevin arrive just as Dick, smiling and laughing, explodes into a huge burst of black goo. When the smoke settles, Sam notices that not only is Dick gone, but so are Castiel and Dean! . Crowley comes in with two demons who kidnap Kevin. Sam asks him where Dean and Cass Cas are and Crowley tells him that he does not know and that he (Sam) is all alone now. Crowley informs Sam that with Dick dead, the Leviathans are now disorganized and will be much easier to beat. He informs Sam he has a small army of demons outside the building waiting to deal with the remaning Leviathans inside, then vanishesdisappears.

Dean wakes up in some dark, scary-looking woods along with Castiel. Cass Cas explains to him that somehow, they've been transported to [[Purgatory]]. He also says that odds are they will both be killed rather than escape. He teleports away leaving Dean behind. Dean looks all around him and sees the souls of several monsters closing in on him.