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.
Debra Morgan
Vogel tells Debra that she had no other choice but to protect Dexter, and shows her recorded interviews with Harry expressing his guilt over training Dexter to kill; in these interviews, Debra learns the truth about her father's death. She reaches out to Dexter, asking him to take a drive with her so they can talk. Once on the road, Debra seizes the steering wheel and plunges the car into the bay, intent on killing herself and her brother. She is rescued, however, and saves Dexter's life by swimming to the car and pulling him out. Debra goes to a resentful Dexter for help when Vogel is kidnapped. While the two of them track Vogel down, Debra tells Dexter that she had saved his life because she couldn't imagine hers without him in it. They find Vogel at the mercy of one of her former patients, serial killer A.J. Yates (Aaron McCusker); Dexter kills him to protect Debra. Dexter and Debra admit they need each other, and they reconcile.