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.
Dexter (season 2)
Starting with this season, the show no longer adapts the Dexter novels. Taking place a month after the first-season finale, Dexter has been unable to kill anyone due to Sgt. James Doakes monitoring his activities and his sister Debra now living with him as she recovers from her traumatic experiences concerning Brian, the Ice Truck Killer. Dexter also realizes that he's having trouble killing even when he has the opportunity, due to feelings of guilt over killing his brother Brian.