"Chapter Four"
While fleeing the scene of Silas' gruesome death, John is intercepted by another hunter, Anderson, who is out to kill Sam. John fights him and his accomplices, but in the confusion, Anderson escapes and pursues the boys to an abandoned motel. Dean tries to fight, and manages to delay Anderson until John arrives. In the ensuing struggle, Dean is forced to take a life for the first time, and John is faced with a choice: heed the warnings and kill his younger son, or risk everything to protect him.