Changes

[[Sam]] and [[Dean]] return to [[the Bunker]] and find that [[Mary]] and [[Jack]] are nowhere to be found. Waiting in the library, they toast to their successful hunt for [[Nick]], and saving [[Donatello]], relieved and their relief that Jack was able to heal Sam. Dean tries to call Mary, but her phone rings in the War Room, sparking concern. Sam tries to call Jack, who but he isn't answering his phone, either. They proceed to call everyone they know, but nobody has seen nor heard from Mary or Jack. [[Rowena]] tells Sam she might have a [[Spells|spell]] to locate them. [[Castiel]] calls Dean back, and expresses worry that Mary was alone with Jack. He confesses his concerns about Jack after witnessing him kill [[Felix]] the snake. Dean angrily hangs up on Cas while Sam tries to track Jack's phone, only to discover he's bouncing all over the globe.

Sam and Dean drive toward the cabin, the last place they traced Jack's phone. Sam tries rationalizing why Jack isn't answering, theorizing he was mistaken and [[Lucifer]] did come back, prompting him to run and . He suggests Jack may have thought he was being kind by killing the snake. Sam tries to understand Jack [[Soullessness|without a soul]], and Dean argues they don't know he doesn't have one, and ends the conversation. They find Nick's burned body inside the cabin, but no sign of Mary or Jack. Behind In the woods behind the cabin, Dean finds a circle of charred earth in the nearby woods.

Cas sits in [[Castiel's Cars|his truck]] at the cabin, remembering a hunt he went on with Mary soon after her return. Cas offered to [[Healing|heal]] a wound for her, but she backed away and declined, and admitted she was still a little afraid of Castielhim. Cas told her how glad Sam and Dean were to have her back, so they don't have to be so alone. She tells Cas that they were never alone. Back in the present, Cas gets out of his truck and goes inside to find Sam and Dean discussing what Jack appears to have done to Nick. Dean describes the blast site outside and thinks Lucifer could've caused it, and gets upset when Sam reminds him that Jack said he stopped Lucifer from coming back. Dean becomes even more upset over the fact Cas knew something was wrong with Jack and didn't say anything to them. Cas explains his fear of losing their family, and why he went in search of a way to cure Jack on his own, feeling it was his responsibility, and that he'd failed all of them. Angry, Dean tells Cas that if anything happened to Mary that he is "dead to me."

Rowena researches is researching a [[resurrection]] spell, when Jack knocks on her door. He demands her help resurrecting Mary. He tells Rowena how Mary's death was an accident, and he is desperate to undo it. While Rowena explains the spell, Sam and Dean arrive at her apartment, and Jack grabs her and disappears before Sam and Dean break the door down. Meanwhile, Cas arrives at the [[playground]], finding it deserted , and he is unable to reach [[Naomi]] on [[angel radio]].

Jack transports Rowena to the Bunker to gather the ingredients for her spell. A scarred spot on the library's wooden floor triggers a memory of Mary teaching Jack knife skills. After Jack dropped the blade many times, leaving numerous marks in the floor, and he was worried Dean would be angry about it when they got him back. Mary smiled and pulled one of the tables over to hide the marks. Within the memory, Jack leaves and Sam joins Mary in the library, asking about Jack's training, and apologizing for not helping her more with it while he's been searching for Dean. They talk about "parental guilt," and Mary has an emotional moment over how amazing Sam grew up to be anyway, before the memory fades into Sam's present, at Rowena's apartment.

Dean is frustrated, upset they have no way to follow Jack and Rowena, and still angry that Cas didn't warn them about Jack sooner. Sam points out that they'd all had concerns and reservations about Jack, and they couldn't blame Cas for reacting the same way they all did, by trying to rationalize it, and hoping that he'd be okay. TheyHe says they'd all refused to see the signs.

At the Bunker, Sam sits at the kitchen table looking through family photos. Cas joins him and confirms that Mary is in Heaven, and at peace. Dean soon enters the kitchen, and Cas tells them that Dumah let him see for himself that she's happy there. Sam says Rowena believes what Jack brought back was just a shell, not capable of life , and asks what they should do now. Dean tells Sam they will do "what they always do" and -- build a [[Hunter's Funeral Pyre|pyre]] and give Mary's body a hunter's funeral. Her initials join Sam's and Dean's on the table in the Bunker.