VIDEO: Watch a Sneak Peek at the SUPERNATURAL Season Finale

On the Season Finale of SUPERNATURAL titled "Who We Are" & 12x23 "All Along the Watchtower", caught in a dangerous situation, Sam (Jared Padalecki) and Dean (Jensen Ackles) only have each other to rely on. Meanwhile, the fight between the American Hunters and the British Hunters comes to a head. John Showalter directed the episode written by Robert Berens. The episode airs Thursday, May 18th on The CW. Get a sneak peek below!

The thrilling and terrifying journey of the Winchester brothers continues. Sam (Jared Padalecki) and Dean (Jensen Ackles) have spent their lives on the road, battling every kind of supernatural threat. Over the years, after dozens of bloody adventures, they have faced everything from the yellow-eyed demon that killed their mother to vampires, ghosts, shapeshifters, angels and fallen gods. They even came face to face with LUCIFER and the Four Horsemen in averting the Apocalypse. With the help of allies - both human and supernatural - they've discovered that every threat they vanquish opens a new door for evil to enter in.

From Warner Bros. Television in association with Wonderland Sound and Vision, with executive producers McG ("Charlie's Angels," "The O.C."), Robert Singer ("Midnight Caller"), Jeremy Carver ("Being Human"), Phil Sgriccia and Adam Glass.