In the Supernatural Season 9 episode " King of the Damned ," Abaddon attempts to solidify her rule by trapping Crowley with his own son, resulting in a violent confrontation with Dean, who uses the Mark of Cain to kill her. Meanwhile, Castiel navigates betrayal within his angelic army while trying to take down Metatron. The episode concludes with Crowley defying fate to save his son and Dean showing signs of corruption from the First Blade.
You can find the full episode summary on the Supernatural Wiki or through a recap on TV Fanatic . [S9E21] King of the Damned
Watch the breakdown of the intense showdown between Dean and Abaddon and how the Mark of Cain begins to consume him: Supernatural 09X21 'King Of The Damned' Episode Review Jeremy Hannaford YouTube• Apr 24, 2025 In the Supernatural Season 9 episode " King