Ep 22. The Prisoner

In Supernatural season 10 episode 22, titled "The Prisoner," Sam and Dean Winchester continue their mission to eliminate the Mark of Cain from Dean's arm. After imprisoning a powerful demon named Rowena, they hope to use her knowledge of powerful spells and connections to the supernatural underworld to find a solution to Dean's problem.

As the episode progresses, tensions rise between the Winchesters and Rowena, with her manipulative nature causing them to question whether they can trust her. However, Rowena's knowledge of the occult proves invaluable as they work to uncover a powerful spell that could potentially cure Dean.

The episode also sees the introduction of a new character - the mysterious and powerful Dark Charlie. Initially believed to be Charlie Bradbury, a beloved hacker and ally of the Winchesters who was killed in a previous season, they soon realize that this is actually an alternate version of Charlie from a parallel universe.

The Winchesters work with Dark Charlie to track down and eliminate a group of rogue angels who have been wreaking havoc in the world. However, they soon discover that Dark Charlie has her own hidden agendas and may not be as trustworthy as they initially believed.

As the episode draws to a close, the Winchesters are faced with difficult decisions and must rely on their instincts and each other to navigate the complex, supernatural world they inhabit.

Overall, "The Prisoner" is a thrilling episode that captivates audiences with its clever plot twists, intense action scenes, and nuanced character development. It is a must-see for fans of Supernatural and anyone who enjoys a well-crafted, supernatural-themed television show.