Overview

• The Trinity Killer prequel series will focus on the early life of Arthur Mitchell, Dexter's most infamous adversary, and how he became a serial killer.
• John Lithgow, who originally portrayed the character, will narrate the series as the voice of his younger self, similar to Michael C. Hall's role in Dexter: Original Sin.
• Showrunner Clyde Phillips and writer Scott Reynolds, veterans of the original Dexter series, are co-creators and executive producers of the project.
• Scripts for the prequel have been completed, but Showtime is prioritizing other Dexter-related projects, including Dexter: Resurrection, set to premiere in June 2025.
• The success of Dexter: Original Sin, which has garnered strong viewership, may influence Showtime's decision to move forward with the Trinity Killer prequel.