Dexter: Original Singives more of a background to Dexter Morgan, one ofthe best TV antiheroes of all time. Now,Dexter’s most iconic villain may get his own, much-anticipated spin-off series. While each season of the originalDexterTV show had its own “big bad,” few are more memorable or chilling than Arthur Mitchell, a.k.a. The Trinity Killer, played by John Lithgow. Of allthe villains inDexter, The Trinity Killer appeared to be the only one who was able to get to Dexter, killing Rita in one of the bestDexterepisodes of all time.
The scene in which Dexter finds Rita’s lifeless body makes her one ofthe most heartbreaking deaths inDexter, and it became clear that The Trinity Killer was not long for the series, as Dexter vowed revenge. Still, his eventual death at Dexter’s hands disappointed many reviewers who would have liked to see more of The Trinity Killer, as Lithgow’s performance was one of the best in the entire series. Fortunately,Dexter’s next prequel may focus on The Trinity Killer, with John Lithgow said to be involved, andOriginal Sinset this up perfectly.

Dexter: Original Sin Season 1, Episode 2 Subtly Features The Trinity Killer’s First Victim, Vicky Noonan
The Trinity Killer’s Full Kill Pattern Is Still Unknown In Original Sin
ThoughDexter: Original Sinis a prequel, Episode 2 ofOriginal Sin, “Kid in a Candy Store” felt nostalgic, taking viewers back to some of the original series' best moments. One of these was seeing Dexter in crime scene investigator mode. When Tanya shows Dexter around the forensics department at Miami Metro, he looks through the unsolved case files, where we see a familiar picture. At around 31 minutes into the episode, Vicky Noonan’s crime scene photo appears.Vicky was the earliest Trinity Killer bathtub victim shown inDexter, though her husband was blamed for her murder.
John Lithgow won a Golden Globe and Primetime Emmy Award for his portrayal of The Trinity Killer inDexterseason 4.

Arthur Mitchell is one of the most complex killers in theDexterfranchise, except for Dexter Morgan himself. After he witnessed his sister die in a tragic and bloody accident, his mother ended her life, and he lived with his father, who was later found murdered, presumably by Arthur. Arthur then becameThe Trinity Killer and had a kill cyclein which he re-enacted the deaths of his family. WhileDexter’s Special Agent Frank Lundy has connected triple murders to the killer (earning him the name “Trinity,") Dexter later discovers that there is a fourth murder in his cycle.
Vicky Noonan’s Unsolved Murder Reference In Original Sin Creates A Great Tie-In To Dexter’s Upcoming Trinity Killer Prequel
Will The Trinity Killer Appear In Dexter: Original Sin?
Dexter: Original Sinis set shortly before the events in the main series, so The Trinity Killer’s full kill cycle has not been discovered yet, and Vicky Noonan’s murder is still unsolved. One of the best parts ofDexterwas seeing Dexter’s serial killer targets in action, then watching him hunting them down over the different episodes.Original Sinhas brought back thisDexterformula, and while The Trinity Killer has not appeared inDexter: Original Sin, showing his first victim is a clever reminder that he is actively killing at the time.
Dexter: Original Sin Season 2 - Confirmation & Everything We Know
Showtime’s Original Sin explores the life of Dexter Morgan in the early 1990s, and now the prequel series has scored a season 2 renewal.
The Trinity KillerDexterprequel has had a positive update, with scripts reportedly being finished and John Lithgow agreeing to voice his younger self as Michael C. Hall voices the inner monologue for Dexter.As it is currently unknown who will play the younger version of The Trinity Killer, he could likely be glimpsed at some point inOriginal Sin, without the viewer knowing until the casting is announced. This would be a great twist and another subtle way to relateDexter: Original Sinto The Trinity Killer after the show made such a clever reference using Vicky Noonan’s picture.

Dexter: Original Sin
Cast
Dexter: Original Sin explores Dexter Morgan’s early years in 1991 Miami as he transitions from student to avenging serial killer. Guided by his father, Harry, Dexter crafts a moral code and navigates a forensics internship at Miami Metro Police, all while controlling his darker impulses.