Episode 01 ARE YOU…?-30 September 2012: After witnessing her brother kill Travis Marshall, Debra attempts to reconcile with Dexter while struggling to cover up their involvement with the murder. Meanwhile, Detective Mike Anderson has an unfortunate run-in, Quinn and Batista begin to make amends, and LaGuerta finds evidence that causes her to re-think the closed Bay Harbor Butcher case.
Episode 02 SUNSHINE AND FROSTY SWIRL –7 October 2012: When a local convict claims he has new information regarding a fifteen-year-old crime spree, Miami Metro sets out to unearth new evidence on the case. While Debra attempts to cure Dexter of his killer tendencies, the Mike Anderson case leads to the Ukrainian mob, and a vengeful Louis won’t stop meddling with Dexter’s life.
Episode 03 BUCK THE SYSTEM -14 October 2012: Dexter tries to bring Debra on board with his new target while the Ukrainian mob seeks revenge for the killing of one of their own. Quinn grows close to a dancer at the mob’s strip club, and LaGuerta attempts to enlist Batista to help her with reopening the case of the Bay Harbor Butcher, whom she believes is still out there.
Episode 04 RUN -21 October 2012: After capturing a deadly killer, things go awry for Miami Metro, sending Debra into a tailspin. In an effort to help his sister, Dexter enters into a dangerous game of cat and mouse, while the Ukrainian mob continues to seek revenge.
Episode 05 SWIM DEEP -28 October 2012: While trying to uncover why someone was killed on his boat, Dexter must out-maneuver a vengeful Isaak. New leads are brought to light on the Wayne Randall case by Hannah McKay, Randall’s alluring former accomplice who Dexter discovers has a secret.
Episode 06 DO THE WRONG THING–4 November 2012: Debra gets to know a local crime writer who’s dug up some incriminating dirt on Hannah McKay – Dexter’s newest obsession. Quinn gets an offer he tries to refuse and Batista is drawn to a new business opportunity. LaGuerta keeps digging into the Bay Harbor Butcher case.
Episode 07 CHEMISTRY -11 November 2012: Things heat up as Dexter and Hannah grow closer, but when Sal Price discovers the two are involved, he wants the exclusive story. Quinn falls back into his old ways as he makes some questionable choices to protect Nadia.
Episode 08 ARGENTINA -18 November 2012: Dexter tries to keep Debra in the dark about his relationship with Hannah, but a surprise visit from Astor, Cody and Harrison throws a wrench into his plans. Fresh out of jail, Isaak renews his pursuit of Dexter while Quinn continues his power struggle with the Koshkas.
Episode 09 HELTER SKELTER -25 November 2012: As Dexter scrambles to track down Isaak, a power struggle erupts among the Koshka Brotherhood, which could prove to Dexter’s advantage. Meanwhile, Miami Dade tries to smoke out the Phantom Arsonist.
Episode 10 THE DARK…WHATEVER –2 December 2012: Dexter is unnerved when Hannah’s father pays him a surprise visit; the Phantom Arsonist’s crimes become more vicious; and Quinn defends Nadia’s honor and finds himself in a volatile situation. Meanwhile; LaGuerta asks a former superior for help on the Bay Harbor Butcher case
Episode 11 DO YOU SEE WHAT I SEE? -9 December 2012: It’s Christmastime, and Debra learns it may be better to receive when she gets a tip from Hannah’s father … one that could lead to incriminating Dexter in a crime. Meanwhile, Dexter discovers that the man behind his mother’s death has been released from prison!
Episode 12 SURPRISE, MOTHERFUCKER! -16 December 2012: LaGuerta is on the verge of exposing Dexter and his killer ways, while he does his best to cover for himself and Debra, and maintain the life he’s created.