Dexter (2006)

S6E5 The Angel of Death

Title: The Angel of Death Plot: As Dexter bonds with his new ally Brother Sam, he begins to question if he possesses a spark of goodness to fight the shadows within. Meanwhile, the hunt for the Doomsday Killers leads him down a different path. Batista and Quinn explore the university where Professor Gellar lectured, seeking answers. In the aftermath of the shooting, Debra is compelled to start therapy due to departmental policies, forcing her to confront her own struggles.