In the sixth-season finale, Dexter and Homicide try to stop the Doomsday Killers from committing one final murder, while Debra deals with a new emotional situation.
Dexter receives spiritual guidance from his new friend, Brother Sam, while his search for the Doomsday Killers leads him in a new direction. Later, Quinn and Batista visit Prof. Gellar’s former university; and Debra is required to undergo post-shooting therapy.
Gellar and Travis’ latest disturbing tableau has Dexter questioning matters of faith. Meanwhile, Homicide uncovers evidence that the killings are religion-motivated and tries to find the zealot responsible; Debra gives her first official press briefing.
Brother Sam, a minister with a criminal history, is brought in by the homicide department to help solve a macabre murder, but Dexter sees him for what he really is—and it’s definitely not a man of God. Elsewhere, Debra’s sudden hero status elicits a pair of surprising proposals