Changes

In a cemetery, Dean confronts Jack with it, but can't bring himself to kill Jack, instead dropping the gun. This enrages Chuck, who demands Dean pick up the gun and kill Jack, going so far as to try and entice Dean by promising to bring [[Mary]] back. But when Dean still refuses, He begins [[smiting]] Jack. As Chuck is about to leave, Sam grabs the weapon and shoots Chuck, hitting Him in the shoulder and injuring himself at the same time. However, it fails to cause Chuck any real harm, only angering Chuck enough that He decides to end the world, unleashing the [[soul]]s of [[Hell]] upon the Earth.

===[[15.01 Back and to the Future]]===

[[Sam]] continues to carry the wound he got from shooting [[Chuck]]. After [[healing]] Sam's knife wound from [[John Wayne Gacy]], Castiel attempts to heal the gun shot, but receives strange visions of Sam and tells him that he cannot heal it as the wound is emitting an energy he has never felt before. Dean later treats the wound and notices that the bullet has no corresponding exit wound.

Sam has a nightmare in which he has continued drinking [[demon blood]]. Dean is battling demons in the Bunker. When [[Dean]] confronts Sam, and talks about how he killed [[Jody]] and [[Bobby]], Sam kills him.

===[[15.05 Proverbs 17:3]]===

Sam continues to have more nightmares -- one where he is [[possessed]] by [[Lucifer]] and Dean tries to kill him before Sam immolates him instead, and another where Dean is affected by the [[Mark of Cain]] and kills him with [[the First Blade]]. Chuck revived [[Lilith]] to have her retrieve the Equalizer, and after Lilith reveals that Chuck's favorite "ending" to the Winchester story is where one brother kills the other, Sam realizes that the Equalizer "shot" a piece of Sam into Chuck, and that he is seeing into Chuck's mind and experiencing God's different endings.