Summary
The forthcomingDexterprequel series,Dexter: Original Sin,has added aGrey’s Anatomystar to its growing lineup. Set 15 years before the events of the original show, thenewDexterprequelhas already added the likes ofShadow and Bone’s Patrick Gibson as a younger version of the character made famous by Michael C. Hall. Meanwhile, Christian Slater is set to play his adopted father, Harry Morgan, andEvil’s Molly Brown has been tapped to play his foul-mouthed, adopted sister Debra.
According toVariety’s new report,Grey’s AnatomystarPatrick Dempsey has joined the cast as Captain Aaron Spencer. Reported as having a decades-long relationship with Slater’s Harry Morgan, Dempsey’s character will see him take charge of the Miami Metro Homicide Department, where the young Dexter embarks on a forensics internship. Praising Dempsey as a beloved actor known internationally for his previous roles, Paramount Global co-CEO Chris McCarthy says they are thrilled to have him joinDexter: Original Sin’s all-star cast. Check out his comments below:

Patrick Dempsey is a beloved actor who is internationally known for the iconic characters he has played and his performances. We are thrilled to have him join our all-star cast of Dexter: Original Sin, the highly anticipated origin story of the franchise.
6 Biggest Questions Dexter: Origins Could Answer
Dexter: Origins has a chance to expand Dexter Morgan’s story and answer the burning questions about his upbringing and early killing years.
Patrick Dempsey’s New Role Raises Questions About Another Original Series Character
Dexter: Original Sin Is Still Missing A Pivotal Character
Given the pivotal role that Tom Matthews played in the original show, often serving to provide insight into Harry’s time as a homicide detective, it is unusual that a younger version of his character has not yet been announced.
While thecast announcements forDexter: New Bloodhave revealed several familiar names will appear in the upcoming prequel, Dempsey’s role as Captain Aaron Spencerhighlights one role that is notably absent. Deputy Chief Tom Matthews, previously played by Geoff Pierson in the originalDextercast, was a close personal friend of Harry Morgan and would have served as Homicide Lieutenant at the timeDexter: Original Sinis set.

Other characters from the original show confirmed to appear inDexter: Original Sininclude Angel Batista (James Martinez), Maria LaGuerta (Christina Milian), and Vince Masuka (Alex Shimizu).
Given the pivotal role that Tom Matthews played in the original show, often providing insight into Harry’s time as a homicide detective,it is unusual that a younger version of his characterhas not yet been announced. Instead, the prequel appears to have introduced a new character in the form of Reno Wilson’s Bobby Watt, who serves as Harry’s homicide partner and best friend. Since Watt is never mentioned in the original show, and Matthews is the one suggested to have been Harry’s best friend at the time, the possible contradiction raises some interesting questions.

However, with the originalDexterfocusing so much on the internal politics of Miami Metro Homicide,it is likely that Matthews’ character will still appear. Moreover, his tenure as Lieutenant under Dempsey’s Captain Spencer could even mirror the same antagonistic relationship he would later experience with the eventual Lieutenant Maria LaGuerta. In the meantime, Dempsey’s addition only serves to add interest in what is shaping up to be a very exciting prequel project.
Dexter
Cast
Dexter is a television series following Dexter Morgan, a blood spatter analyst for Miami Metro Police who secretly leads a dual life as a vigilante serial killer. Released in 2006, the show focuses on Dexter’s internal conflict as he hunts down criminals who elude justice within the legal system.