Resurrection. After enduring unspeakable torture, Dean escapes from Hell. Was he rescued by Sam, whose powers increase daily? Or by angels of the Lord, intent on defeating Satan in an impending Armageddon pitting Heaven against the terrifying evil unleashed from Hell? Doing as their father taught them, Sam and Dean continue to travel the back roads, hunting ghosts, vampires, witches and more dark spirits. And they travel back in time to discover shocking truths about their parents and in a visit to their old high school their own teenage years. All the while, the ultimate war draws them into its horror throughout this enthralling 6-disc,22-episode Season Four. Caught between Heaven and Hell, between God and the Devil, the Winchester brothers must battle for the future of humankind.