Donna's deputy Doug is forced to kill the young man to save Donna, and she and the Winchesters burn the mask and believe it to be over. It was so seamless and easy. Lucifer reveals himself and nearly kills Sam, but Castiel manages to regain control long enough to stop him and inform Sam of the situation. She hears a scream and runs up to her daughter's bedroom. In the past, Bobby heads off to follow a lead on Lilith, while in the present the brothers go off to finish Bobby's case in Tennessee. There is one possible theory that fans may have forget.
An infected Sam works to find a cure to the Darkness' poisoning with little luck. 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. Meanwhile, Castiel sees Metatron on television and tracks him down, taking the demon tablet. Sam discovers that it's the same motel where Bobby and Rufus stayed, and he asks for the same room, for luck. But maybe I'm just really not remembering.
Castiel deems Metatron harmless and lets him leave, to the Winchesters' shock. I really wish they didn't feel they need to kill everyone off on this show. I think in the case of Harvey, he was close to death or dead already, so there was no body for his soul to return to once Bobby figured out how to trap the damn thing. Castiel and a low level angel search to see if Amara survived, while the angel points out that Castiel is more expendable than the Winchesters. If however, they became ghosts: yikes, because that would be one messy problem later.
Realizing Chester is the ghost, Donna and Doug collect all of the costumes and burn them while Dean talks to the first victim's widow and learns that Chester supposedly molested the children of the two victims. Amara doesn't seem interested in a world of pure evil but she feeds on enough demons to make herself a teenager and demands Crowley bring her more. Mom goes to the bedroom to comfort her daughter, who is certain there is something bad in the house. After losing their mother to a supernatural force, the brothers were raised by their father as soldiers who track mysterious and demonic creatures. Sam finds the doctor who was treating the family from Rufus' and Bobby's case. The fog and infections disappear and all the townspeople, including those who were killed, are restored to life. His friendship with Rufus is the best.
A resident named Mildred sees the creature commit its second kill of the building manager. The Winchesters leave them as a newly united family. I know that time is wonky, but I don't see how Bobby's soul could have been trapped in the nest for 7 years. A similar argument happens between Sam and Dean. Chester's sister Rita explains that after she was confronted with the accusations of child molestation, she worried about her own son and helped the two men get to Chester to scare him. The spell is actually a curse, transferred by kissing and is working its way back to the spell-caster, Melissa.
I don't think they'd have lasted much longer than a few days either, had they not found a way to kill the soul eater. As Dean refuses to leave Sam, Corbin suffocates Sam, seemingly killing him in order to force Dean to abandon his brother. She believes the recent murders in town are supernatural and wants the boys' help. He and two others go to arrest her, saying if she resists the combined might of every angel will kill her. Sam and Dean go to speak to the family from the past case, the Hendersons. Dean wants to kill the infected and escape with the baby but Sam wants to try and cure them. Both Dean and Bobby find the children from their respective cases inside the house, and while they are talking and trying to help them and Dean is painting his sigil , Rufus and Sam are doing their best to finish their sigils in the outside world.
That's the difficulty with time plots. Meanwhile, the Winchesters investigate a murder-suicide and soon learn it is a stronger version of the infectious fog produced by Amara that is making the townspeople go mad. After barely locking her away and seeing all the conflict both humans and angels create, Chuck walked away, letting them sort it out for themselves, and he sees no point in fighting Amara again. In both hunts, a fight ensues. They are discussing Amara, the lack of news about her and Castiel, and after two weeks, they are growing discouraged.
Those not near a television can watch the show online through their mobile device or personal computer. Sam is shocked to wake up and see his own childhood imaginary friend Sully is real. They find her and she does so, but she escapes. When he peels more of the wallpaper away, he reveals a sigil painted on the wall. In the present day Sam and Dean investigate a case in a retirement home where one of the residents died in a similar manner.