Ep 23. All Along the Watchtower

The Supernatural season 12 episode 23 titled "All Along the Watchtower" is the season finale and a highly anticipated episode for fans of the long-running series. As the episode begins, we see Sam and Dean in a race against time to try and stop the powerful and evil nephilim Jack from bringing about the end of the world. As they plot their next move, they are visited by their old friend and ally, Bobby Singer, who offers to help them take Jack down.

Meanwhile, we see Lucifer still trying to get control of his son, Jack, even as the boy's incredible powers continue to grow. Castiel tries to reason with him but finds himself overpowered and restrained by the dangerous archangel. Lucifer and Jack seem poised to wreak havoc and destruction on everything and everyone around them.

Against this backdrop, Sam, Dean, and Bobby hatch a dangerous plan to confront Jack. The three of them sneak into an old bunker that holds a powerful spell capable of neutralizing Jack's powers. But as they prepare to cast the spell, they realize that it may not be enough to stop Jack and that they will need to make a difficult choice to save themselves and the entire world.

The episode builds to an action-packed and emotional climax as Sam and Dean find themselves face-to-face with Jack, Lucifer, and a massive army of demons all converging on their location. With everything on the line, the Winchesters make a bold decision that will forever change their lives and the course of the Supernatural universe.

"All Along the Watchtower" is a thrilling and intense finale that delivers on all the promises and expectations of the season. It offers resolution to long-standing story arcs while also setting the stage for the future of the series. Fans of the show will be on the edge of their seats as they watch the Winchesters and their allies battle for the fate of the world, and the episode is sure to leave viewers eager for more.