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".
Dexter (season 5)
Meanwhile, the subplots throughout the season focus on the relationships of LaGuerta and Angel, who have made their marriage public but are having marital issues, and of Quinn and Debra who become romantically involved. When Angel gets involved in a bar fight which gets him in trouble with the Internal Affairs Department (IAD), LaGuerta saves him by helping IAD set up a sting on another cop who is under suspicion, Stan Liddy. Liddy develops a friendship with Quinn, their common bond being they were both "betrayed" by LaGuerta, and Quinn pays Liddy to investigate Dexter. Debra remains unaware that Quinn suspects her brother is Kyle Butler.