Dean (Jensen Ackles) and Sam Winchester (Jared Padalecki) are two brothers with a special talent. Well-versed in the supernatural after their father became convinced that their mother was captured by unholy spirits, Dean and Sam dedicated their young lives to hunting down these otherworldly terrors. But adulthood saw Sam drift away from that world, instead choosing to settle down in a life of domestic bliss with his girlfriend. When the Winchesters' dad goes missing, both Dean and Sam know what they have to do--and some epic cross-country trips ensue, as the brothers try to find their father. In the fourth season, Dean has made a remarkable getaway from hell, but this brings consequences. Now, the brothers must join the war against hell to keep the end of the world from arriving. All 22 episodes of the fourth season are included here.