THE ROAD SO FAR
After Dean's death at the hands of Lilith, Sam became obsessed with revenge. Consumed with hunting down and killing every demon he could find on the fast track to Lilith, he began using his demon powers due to the fact of Azazel's profane blood pumping through his veins. You see Azazel bled into his mouth in the pilot episode, thus giving him his psychic visions. With the help and motherly nurturing of Ruby, Sam advanced in his abilities and the premiere showed him exorcising with his mind. Four months later, Dean wakes in his coffin, rescued by a creature he has never seen before, an Angel. The Angel, who has since become a SUPERNATURAL staple, is Castiel, The Angel of Thursday according to Irish myth.
After the reunion of the brothers, Castiel warns Dean in a dream that Lilith is trying to break the 66 seals to free Lucifer from hell and bring on the Apocalypse. Now since any 66 seals can be broken, it's virtually impossible to tell which ones she is going to break, and when. Of course, The Apocalypse is not the only evil on the board, as the brothers must take on cases involving vampires, werewolves, one nutty shapeshifter, to Ghost sickness and even a drunk, bipolar seven - foot tall teddy bear! A bizarre case involves the introduction of a prophet and a series of books with some familiar stories.
With all this going on, can the Winchesters stop the breaking of the seals? The best season up to that point, these season 4 episodes are a MUST for every SUPERNATURAL fan.