Supernatural (Season 8)

 One year after being dragged to Purgatory, Dean returns to Earth without Castiel, carrying inside his body the soul of a vampire named Benny. The two brothers begin a fight against Crowley to find the Demon Tablet and lock the Gates of Hell, thereby trapping all demons in Hell. Castiel, brought back by an angel named Naomi, takes possession of the Angel Tablet. After realizing that to lock the Gates of Hell Sam must die, Dean ends the trials. Castiel, however, is stripped of his grace by an angel named Metatron who proceeds to have millions of angels locked out of Heaven.