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".
Dex Dexter
Dex and Alexis's relationship is short-lived. In episode 162, Blake and Alexis are in an oil rig explosion in the South China Sea. Dex and Krystle (Blake's wife) rush to the hospital, only do discover they have disappeared. In episode 163, they find out that Blake is suffering from amnesia, remembering nothing past 1964. Alexis has convinced Blake that they're still married. When Blake's memory returns, Dex accuses Alexis of still loving her ex-husband. They fight, and Dex finally tells Alexis he is leaving her for good in episode 165.
In episode 165, Dex and Dominique Deveraux start spending time together, and romance seems poised to bloom. They travel together to Wyoming to visit Dex's father and his best friend, Boyd Curtis. Unfortunately, Boyd and his daughter are killed in a car wreck that same day. Dex convinces Boyd's widow, Sarah, to donate her daughter's heart to Blake and Krystle's ailing daughter, Krystina.