All Along The Watchtowersupernatural | : Season 1...

: The episode features the heartbreaking deaths of major characters, including Crowley , who sacrifices himself to trap Lucifer, and Castiel , who is shockingly killed by Lucifer.

: The story introduces a "tear in space-time" leading to an alternate reality —a bleak world where the Winchesters were never born and the war between angels and demons has devastated the planet. All Along the WatchtowerSupernatural : Season 1...

: The episode leaves Sam and Dean at their most vulnerable, losing their mother Mary to the rift and standing over the bodies of their closest allies. Supernatural - All Along the Watchtower - Kneel Before Blog : The episode features the heartbreaking deaths of