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.
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.