WARNING: SPOILERS ahead for the Dexter: Original Sin season 1 finale!
Dexter: Original Sin’s season 1 finale did not disappoint, offering closure to Aaron Spencer’s villain, additionalbackstory on Brian Moser’s upbringing, and revealing what kind of monster Dexter really is. Originally titled “Born This Way” but changed to “Code Blues”,Dexter: Original Sinepisode 10 shows Dexter saving Nicky Spencer’s life, nearly letting Aaron get away in the process. Gibson’s Dexter, who is clinically spot on to Michael C. Hall’s iconic portrayal, develops from an eager bloodthirsty sociopath to a borderline superhero.

Splitting the villain dutiesbetween Spencer and Brian Moser proved to be an extraordinary creative decision by showrunner Clyde Phillips and his writing staff. Aconfrontation between Brian and Harry adds new layers of unforeseen suspense and backstory, nearly humanizing Brian’s disturbed character. Spencer’s motivation to kill was revealed to be a revenge tour against his adulterous wife, Becca, who lied about Nicky being Spencer’s son. Even in the background, Deb is given an appropriate conclusion, joining Dexter and Harry as a budding member of Miami Metro.
His Surprise Emergence In The Latter Half Of Season 1 Elevated It To New Heights
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The best-kept secret ofDexter: Original Sinseason 1 was the surprising return of Brian Moser, who was hinted at several times during the prequel series' early episodes. His return pays off in theOriginal Sinfinale in a face-to-face standoff with Harry after the episode opens up witha never-before-seen deep dive into his troubled upbringing.
Dexter: Original Sin Brutally Foreshadows Deb & Dexter’s Worst Moment From The OG Season 1 Finale
Dexter: Original Sin episode 9 reveals several unknown details about Brian Moser and one of his earliest encounters with his future girlfriend, Deb.
After Harry and Doris disown him, as shown in anOriginal Sinepisode 9flashback, Brian’s fate is left in the hands of Barb Plimpton, his social worker. It’s no coincidence that Brian kills her, his former therapist, and several of his adoptive siblings in Miami trying to get Dexter’s attention. AsBrian explains to Harry, he was turned over to institutions and “the system”, which molded him into a cold-blooded killer without a moral compass to guide him like Harry’s code.

Brian Moser will continue watching Dexter from afar. Since he and Dexter don’t officially reunite until 2006 whenDexterseason 1 is set, he shouldn’t have too much of a role in season 2.Brian agrees that Harry is the best thing for Dexterand emerging suddenly in his life would only complicate things. Brian will strangely love Dexter by not being around in future episodes of the prequel series. His absence should make room for another main villain inDexter: Original Sinseason 2.
Spencer’s kill spree is rationalized as being “clouded by anger”, which would come off as somewhat cheap if Brian wasn’t given such a gripping spotlight.

Interestingly,Spencer tells Dexter “If he only knew how his father failed him”, which is the same message Brian had for Dexter regarding the truth about Laura Moser. Brian becomes so compelling in theOriginal Sinfinale that loose-end characters like Gio don’t even matter by comparison. Spencer’s kill spree is rationalized as being “clouded by anger”, which would come off as somewhat cheap if Brian wasn’t given such a gripping spotlight.
Harry’s Season 1 Survival & Deb Joining Miami Metro Makes Season 2 Extremely Promising
Original Sin Has The Potential To Outdo Some Of The Original Dexter Seasons
The season 1 finale left the series in a great place for a potentialDexter: Original Sinseason 2.There is still a fair amount of Harry’s backstory to dive intosince his character was not killed off in the episode as many viewers had predicted. With Laura Moser’s backstory wrapped up, it’s unlikely season 2 will have multiple timelines or feature as many flashback scenes to Dexter’s early childhood days. This will keep the show rooted in the present like many original series seasons.
Dexter: Original Sinis a triumph for theDexterfranchise and a blueprint for all modern prequel series.
With Spencer now dead, the Miami Metro Homicide Captain’s seat is now open, although it may not go directly to longstanding original series Captain Thomas Matthews. Still, he is more likely than ever to be added to theOriginal Sinseason 2 cast in some capacity. This also raises the question of what other originalDextercharacters could emerge, such as Dr. Evelyn Bogel, who had an instrumental role in developing Harry’s Code, and the hilarious fan-favorite Sergeant James Doakes.
Aside from Brian’s incognito cameo inDexter: Original Sinepisode 2,Dexterseason 3 regular Miguel Prado was briefly seen kissing LaGuerta in one scene in the prequel series, hinting at a recurring role for him. While these plot and character elements have yet to be determined, it’s clearer than ever thatPhillips and his writers have a firm grasp on the prequel seriesand can actually make new seasons that are on par with, or even better than, the original show.
8 seasons may be pushing it, butDexter: Original Sinshould be a Paramount+ with Showtime staple for years.
In short,Dexter: Original Sinis a triumph for theDexterfranchise and a blueprint for all modern prequel series. It expertly captured the feel of the original show and brilliantly cast returning and brand-new characters, resulting inone of the bestDexterseasons ever made. Expanding the backstories of Laura, Harry, and Brian is what prequel shows like these are all about. Eight seasons may be pushing it, butDexter: Original Sinshould be a Paramount+ with Showtime staple for years to come.
Dexter: Original Sin
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.