Dexter

Dexter is an American television drama series, which debuted on Showtime on October 1, 2006.
The series Dexter is based on the detective novel "Darkly Dreaming Dexter" by Jeff Lindsay, and tells the story of a strange man named Dexter Morgan.

The main character is Dexter,a blood spatter pattern analyst for the Miami Metro Police Department, but also a serial killer trained by his adoptive father, a former policeman who once saw the kind of desire that his son had. Dexter was adopted still too young for a couple, Harry and Doris Morgan. Harry is already dead, but a policeman was honored, which ultimately influence the careers of both Dexter and Debra, the couple's biological daughter. Concerned about the fate of Dexter, Harry begins to teach him a code of conduct. What channel killers Dexter wishes for something less destructive. Teach him that he should not kill innocent people. And teach him tricks, not a trace.

Throughout the series we see Dexter trying to appear to be a normal person, pretends about social interactions, including having a girlfriend, Rita. He chose her because she was beaten by her husband, and therefore he can hide the void within him, which make him being unable to express feelings by anyone.