Plot Summary:

Showtime renewed Dexter for a fifth season, which premiered on September 26, 2010. Julia Stiles will guest star in 10 episodes as Lumen, a new woman in Dexters life. Shawn Hatosy will appear in a multiple episode arc as a bad guy. Maria Doyle Kennedy will also join the cast of Dexter in Season 5 as an Irish nanny. April Lee Hernandez has been called for a recurring role as a police officer. Jonny Lee Miller has been added to the cast as a mysterious man who is intricately involved in a storyline with Julia Stiles. Peter Weller will also join the cast, playing a troubled Miami Metro police officer who gets caught up in an internal affairs investigation. The actor will appear in eight of the twelve episodes. Chris Vance will play a character named Cole, a meticulous, well-spoken personal aide to a famous businessman, in at least three episodes. The first episode of Season 5, which premiered on 26 September focuses primarily on how Dexter deals with his recent loss, coming to terms with the death of his spouse and allowing some human emotions to be expressed.On July 24, 2010, a trailer was screened at Comic-Con, an annual fan convention in San Diego, California. Dexter appears to be a principal suspect in Ritas murder, struggles to satisfy the Dark Passenger while being a single father, and must also contend with a very bitter Astor.