Tonight: the re-run of the eighth episode of season 6 "Sin of Omission" on Showtime. The episode was written by Arika Lisanne Mittman and directed by Ernest Dickerson.
Dexter uses lessons he learned from Brother Sam to follow up on some new leads in the Doomsday investigation; Debra butts heads with Captain LaGuerta over the case of a dead call girl.
Refresh your memory by watching the promo below and find everything about the episode here.