Jennifer Leann Carpenter is an American actress. She is known for playing Debra Morgan in 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. In 2019, she began playing Erica Shepherd, the lead role in the NBC drama The Enemy Within. In 2020, Carpenter voiced Sonya Blade in the direct-to-video martial arts film Mortal Kombat Legends: Scorpion's Revenge (2020), a role she reprised in the sequel Mortal Kombat Legends: Battle of the Realms (2021).