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".
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.