Sam continues to do whatever he can to save Dean from going to Hell; he begins to become more ruthless and is willing to kill anything demonic even if his prey is part human (i.e., demonically-possessed humans), human witches, and even Gordon Walker, who became a vampire. Sam later reveals that he is trying to become more like Dean so that, if he fails to save Dean's soul, he is ready to face a world full of demons on his own.