Jennifer Carpenter
Jennifer Leann Carpenter (born December 7, 1979) is an American actress. She is known for playing Debra Morgan, the adoptive sister of the title character of the Showtime series "Dexter", for which she earned a Saturn Award in 2009, and also for playing Rebecca Harris in the CBS television series "Limitless".
The Dark Defender
In the episode, Dexter Morgan (Michael C. Hall) investigates a crime scene in a comic book store where he sees a poster of The Dark Defender, a character inspired by Dexter's own crimes under the guise of the "Bay Harbor Butcher", who is currently under investigation in his own police department. After he dreams that The Dark Defender saved his mother's life when he was young, Dexter's Narcotics Anonymous sponsor Lila Tournay (Jaime Murray) encourages him to seek closure by confronting one of his mother's killers, Santos Jimenez (Tony Amendola). Meanwhile, Dexter's sister Debra (Jennifer Carpenter) suspects that her new boyfriend Gabriel (Dave Baez) is using her to write a book about her engagement to the first season's "Ice Truck Killer".