List of Dexter characters
On a visit to his sister, Dexter and Debra both feel as if they have been drugged; just before he passes out, Dexter sees Hannah standing over him. When he later regains consciousness, Dexter begins investigating Hannah, and finds that she has changed her name and married Miles Foster (Julian Sands), a wealthy businessman. Dexter goes to see Hannah, who says that she had wanted him to kill Foster, but changed her mind after realizing she is still in love with Dexter. Foster warns him to stay away from Hannah, and has him beaten up. Dexter goes to Foster's boat to protect Hannah, but finds that she has already killed him. The two of them dispose of the body, and promise to watch out for each other. The two end up having sex and rekindle their relationship.
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".