As LaGuerta closes in on Dexter's secret, Dexter struggles to protect himself, Debra, and the life he's built, in this disturbing season finale.
As Christmas approaches, Dexter tries to balance his life with Hannah and his relationship with Debra, but unbeknownst to Dexter, Debra follows up on what could be an incriminating tip that Hannah's father gave her.
A surprise visit from Hannah's father puts Dexter on alert, and the Phantom Arsonist's crimes become more gruesome. Defending Nadia's honor forces Quinn into a dangerous situation.
Dexter deals with Isaak; Miami Metro is on the hunt for an arsonist.
Dexter tries to keep Debra in the dark about his relationship with Hannah, but a surprise visit throws a wrench into Dexter's plans. Now out of jail, Isaak renews his pursuit of Dexter.
Things heat up as Dexter and Hannah grow closer. Sal helps Debra uncover new evidence about Hannah, while Quinn makes questionable choices to protect his girlfriend.
Dexter becomes more intrigued by Hannah, while crime writer Sal Price has dug up some possibly incriminating dirt on Hannah. Debra can't stop Laguerta from upending the Bay Harbour Butcher case.
While trying to uncover why Louis was killed on his boat, Dexter must out-maneuver Isaak. New leads are brought to light on the Wayne Randall killing.
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.
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.