Dean helps Jenna, the deputy he met after the Darkness fell, get back home safely and then sets off to help Sam deal with a town infected by a mysterious and deadly gas. However, when Jenna falls into dangerous hands, she calls Dean for help and Sam tells him to go back to her. Unfortunately for Sam, he isn't able to handle the townspeople turned monsters as easily as he thought.
O' Death (feat. Lisa Berry) — Supernatural Cast
At the Nuckolls County Medical Center, Sam works when hears singing and finds Billie singing in the hallway as she reaps souls of the dead caused by the Darkness.
Sugar Shack — Jimmy Gilmer & The Fireballs
Sam lures three infected to the Nuckolls County Medical Center following the sound of the music to the hospital chapel into a ring of holy oil
Who — melergy
Dean stabs Crowley in the hand and searches the house for The Darkness child
Form and Void — Jay Gruska
In Jenna's grandmother's house: Dean pins Crowley to the wall by stabbing an angel blade through his hand. He goes back to where he'd left Amara but she has disappeared, as has Crowley.