Succes 2011: Michael C. Hall as Dexter Morgan, a serial killer "pas comme les autres"

Dexter is an American television drama series that centers on Dexter Morgan (Michael C. Hall), a bloodstain pattern analyst for the Miami Metro Police Department who moonlights as a serial killer. The show debuted on October 1, 2006, on Showtime and the fifth season ended on December 12, 2010. As of December 2, 2010, the show has been renewed for a sixth season. Set in Miami, the show's first season was largely based on the novel Darkly Dreaming Dexter by Jeff Lindsay, the first of his series of Dexter novels. Subsequent seasons have evolved independently of Lindsay's works. It was adapted for television by screenwriter James Manos, Jr., who wrote the first episode.

Dexter structures his killing around "Harry's code", a body of ethics and procedures devised by his adoptive father Harry Morgan (who was a Miami cop) to make sure Dexter never gets caught and to ensure that Dexter kills only morally wrong people. Harry also trained Dexter in how to interact convincingly with other people despite his dissociative mental illness, which Harry believed to be psychopathy, arising from Dexter witnessing the brutal murder of his biological mother, Laura Moser. As an adult, Dexter has largely escaped suspicion (with some exceptions) by being genial and generous and maintaining generally superficial relationships. However, his attachment to his foster (and ultimately adoptive) sister, Debra, his girlfriend (later wife), Rita, his stepchildren, Astor and Cody, and later his biological son, Harrison, have all complicated his double life and made him question his need to kill. In fact, in the first season, his relationship with Rita set in motion the slow but steady humanization of Dexter, progressing further with each season, as Dexter begins to experience a variety of emotions for the first time in decades.
In February 2008, syndicated (edited down to a TV-14 rating) reruns began to air on CBS. The series has enjoyed wide critical acclaim and popularity. Season 4 aired its season finale on December 13, 2009 to a record-breaking audience of 2.6 million viewers, making it the most-watched original series episode ever on Showtime. Michael C. Hall has received several awards and nominations for his portrayal of Dexter, including a Golden Globe. The series was picked up by Showtime for a sixth season, which was not billed as being the final season, leaving possibilities open for a seventh. The sixth season is set to start airing October 2, 2011 at 9:00pm (EST/PST). This show is rated TV-MA-L,S,V (AC, GL, GV, BN) on Showtime.
Orphaned at the age of three due to the murder of his mother, Dexter Morgan is adopted by Miami police officer Harry Morgan and his wife Doris. After discovering that young Dexter has been killing a multitude of neighborhood pets for several years, Harry tells Dexter that he believes the need to kill "got into" him at too young of an age, and that he believes Dexter's need to kill will only grow. To keep Dexter from killing innocent people, Harry begins teaching Dexter "The Code." In this code, Dexter's victims must be killers themselves who have killed someone without justifiable cause and will likely do so again. Dexter must also always be sure that his target is guilty, and thus, frequently goes to extreme lengths to get undeniable proof of his victim's guilt. Most importantly, Dexter must never get caught. Flashbacks throughout the series show Harry, who died several years before, instructing Dexter on how to fake human behaviour, how to cover his tracks after a kill, and even how to stranglehold a target to knock them out and capture them.
Dexter has followed The Code religiously to satisfy his "Dark Passenger" (the name he has assigned to his urge to kill). Like many serial killers, he keeps trophies; before dispatching a wrongdoer, Dexter makes an incision on their cheek with a scalpel and collects a blood sample, which he preserves on a blood slide. He stores his collection in a box concealed inside his air conditioner.
In the beginning of the series, Dexter states that he has no emotions, and he has to work non-stop to appear normal and blend in with the other people around him. Initially, Dexter is (with varying success) able to fake 'normal' emotions and maintain his appearance as an unremarkable friend and neighbor. He does maintain a few personal relationships early on, stating that he is "fond" of his adoptive sister Debra. She is unaware of Harry's training or Dexter's secret life, but harbors lingering jealousy of the perceived preferential treatment Harry gave Dexter. As part of his "disguise" in season one, Dexter dates a woman named Rita who is too traumatized from years of abuse at the hands of her ex-husband, Paul Bennett, to be intimate with Dexter. This suits Dexter, who believes getting intimate will reveal his darker side to Rita. He is fond of (and good with) children in general, particularly Rita's two children, Astor and Cody.

The third season finale on December 14, 2008 was watched by 1.51 million viewers, giving Showtime its highest ratings for any of its original series since 2004, when Nielsen started including original shows on premium channels in its ratings. The fourth season finale aired on December 13, 2009 and was watched by 2.6 million viewers. It broke records for all of Showtime's original series and was their highest rated telecast in over a decade. The fifth season finale was watched by a slightly smaller number of people (2.5 million). However, the fifth season as a whole was the highest rated season of Dexter, as it was watched, either on plain or on-demand TV, by more than 5 million people per week.