‘Dexter: Original Sin’ Trailer Reveals His Past (And Future?)

The first cut is the deepest, and Paramount+ With Showtime is taking us back to the start of Dexter Morgan’s vigilante murders with the upcoming series Dexter: Original Sin.

The streamer has released a new trailer for the prequel series that shows the younger version of the titular serial slaughterer as he learns to hone his code and craft, with the help of his adoptive father.  The trailer also may give fans the answers to the biggest question surrounding the upcoming sequel series, Dexter: Resurrection, by showing Michael C. Hall’s version being rushed to the hospital after bleeding out in the cold in New Blood. Dun dun dun…

The franchise continues to be killer for the network (there’s even more coming!), so read on for everything you need to know about the prequel coming to TVs soon, how much Michael C. Hall is involved in it, and more.

When does Dexter: Original Sin take place?

The new thriller is set 15 years before the original Dexter series, which aired eight seasons from 2006 to 2013.

What is the prequel about?

The 10-episode drama series follows America’s favorite serial killer in training, with Patrick Gibson taking on the role of Dexter as “he transitions from student to avenging serial killer. When his bloodthirsty urges can’t be ignored any longer, Dexter must learn to channel his inner darkness. With the guidance of his father, Harry (Christian Slater), he adopts a Code designed to help him find and kill people who deserve to be eliminated from society without getting on law enforcement’s radar. This is a particular challenge for young Dexter as he begins a forensics internship at the Miami Metro Police Department.”

Who’s in the Dexter: Original Sin cast?

In addition to Gibson and Slater, Dexter stars Patrick Dempsey, Molly Brown, James Martinez, Christina Milian, Alex Shimizu, and Reno Wilson. Sarah Michelle Gellar is a special guest star.

Scroll down to see the cast (some in character!) opposite the actors who originated their roles on Dexter, as well as the actors we’d cast to play other Dexter characters.

Is Michael C. Hall involved in the prequel?

Yes! In addition to executive producing Original Sin, Hall voices the iconic inner monologue in Dexter Morgan’s head.

When and where will Dexter: Original Sin premiere?

The series, which is currently filming in Los Angeles, will premiere on Friday, December 13 on streaming and on demand for Paramount+ subscribers with the Paramount+ With Showtime plan. Its linear, on-air debut will come on Sunday, December 15.

Are there any other Dexter series coming?

Yes! There’s a new spinoff coming, Dexter: Resurrection, in summer 2025. It is set after Dexter: New Blood, and Hall will once again play Dexter, who was last seen dead.

Patrick Gibson as Dexter Morgan in 'Dexter: Original Sin' and Michael C. Hall as Dexter Morgan in 'Dexter'
Patrick Wymore / Paramount+ with Showtime; Randy Tepper / ©Showtime / courtesy Everett Collection

Patrick Gibson vs. Michael C. Hall as Dexter Morgan

Gibson’s past credits include The OA, The White Princess, and Shadow and Bone. He’ll play the young Dexter as the character begins a forensics internship at the Miami Metro Police Department.

Molly Brown as Debra Morgan in 'Dexter: Original Sin' and Jennifer Carpenter as Debra Morgan in 'Dexter'
Myrna Suarez / Paramount+ with Showtime; Randy Tepper / ©Showtime / courtesy Everett Collection

Molly Brown vs. Jennifer Carpenter as Debra Morgan

Brown recently guest-starred on FBI: International, Billions, and Evil. She’s the Original Sin version of Debra Morgan, Dexter’s younger sister and eventual coworker in Miami Metro, who is oblivious to his bloody side gig.

Christian Slater as Harry Morgan in 'Dexter: Original Sin' and James Remar as Harry Morgan in 'Dexter'
Patrick Wymore / Paramount+ with Showtime; Peter Lovino / © Showtime / Courtesy: Everett Collection

Christian Slater vs. James Remar as Harry Morgan

Slater, known for the film Heathers and the TV series Mr. Robot, plays Harry Morgan, a homicide detective who adopts Dexter and helps him “find and kill people who deserve to be eliminated from society without getting on law enforcement’s radar,” as Paramount+ With Showtime says.

James Martinez, David Zayas as Angel Batista in 'Dexter'
Jesse Grant/Getty Images for Paramount+, Peter Iovino/Showtime/Courtesy: Everett Collection

James Martinez vs. David Zayas as Angel Batista

An alum of House of Cards and Love, Victor, Martinez takes on the role of Batista, who’s “an up-and-coming homicide detective who leads with his heart” at the time of Dexter: Original Sin.

Christina Milian, Luna Lauren Velez as Maria LaGuerta in 'Dexter'
Jeff Spicer/Getty Images, Peter Iovino/Showtime/Courtesy: Everett Collection

Christina Milian vs. Luna Lauren Velez as Maria LaGuerta

The younger version of Miami Metro’s first female homicide detective, meanwhile, goes to Milian, a pop star-turned-actor recently seen in the TV series Step Up.

Alex Shimizu, C.S. Lee as Vince Masuka in 'Dexter'
Alex Shimizu/Instagram, Peter Iovino/Showtime/Courtesy: Everett Collection

Alex Shimizu vs. C.S. Lee as Vince Masuka

Shimizu, who recurred on The Blacklist and will star in the upcoming Interior Chinatown, plays a younger Masuka, “a forensic analyst who eagerly shares his expertise while relishing the chance to boss around his new intern, Dexter Morgan.”

Reno Wilson
Jesse Grant/Getty Images for Paramount+

Reno Wilson plays new character Bobby Watt

Wilson, who previously starred in Mike & Molly and Good Girls, has been cast to play the new character Bobby Watt, Harry’s longtime partner and confidant.

Dove Cameron, Julie Benz as Rita Bennett in 'Dexter'
Emma McIntyre/Getty Images for The Recording Academy, Peter Iovino/Showtime/Courtesy: Everett Collection

Dove Cameron could play Rita Bennett, previously played by Julie Benz

We could see this Disney Channel alum, known for her role in the Descendants series of TV movies, succeed Benz (or precede Benz, as the case may be) in the role of Rita, the older Dexter’s love interest.

Kelvin Harrison Jr., Erik King as James Doakes in 'Dexter'
Leon Bennett/Getty Images for Critics Choice Association, Peter Iovino/Showtime/Courtesy: Everett Collection

Kelvin Harrison Jr. could play James Doakes, previously played by Erik King

Harrison, star of the film Chevalier and the TV series Genius: MLK/X, would be a worthy cast addition in the role of Doakes, the Miami Metro colleague who harbors a healthy distrust for Dexter.

Logan Lerman, Desmond Harrington as Joey Quinn in 'Dexter'
Matt Winkelmeyer/Getty Images, Peter Iovino/Showtime/Courtesy: Everett Collection

Logan Lerman could play Joey Quinn, previously played by Desmond Harrington

In Dexter, Harrington’s Quinn is another Miami Metro investigator with suspicions about the title character. Lerman, an alum of the Percy Jackson film series and the TV series Hunters, could portray a fresh-faced version of the character.