How to Watch 'Dexter: Original Sin' With Sling

A killer prequel centered on the early years of Dexter Morgan just launched on Paramount+ with SHOWTIME. Here’s how to watch with or without a Sling subscription.

They say you never forget your first kill. And by “they,” we mean the character of Dexter Morgan, the ethical serial killer at the center of an extended universe that, like the blood from a murder scene, is spreading wider and wider across Paramount+ with SHOWTIME.

Following 2021’s sequel/ reboot (seqboot?) Dexter: New Blood, a new spinoff series has just premiered on Paramount+ with SHOWTIME. As context clues might help you decipher, Dexter: Original Sin is a prequel series that details the early years of Miami’s favorite murderer. Here’s a look at the new series, plus specifics on how to watch Dexter: Original Sin on Paramount+ with SHOWTIME with Sling.

How to Watch Dexter: Original Sin With Sling

You can watch new episodes of Dexter: Original Sin – along with all eight seasons of the original Dexter series and Dexter: New Blood – by adding Paramount+ with SHOWTIME to your Sling subscription or Sling Freestream account for $5 for your first month. In addition to these series, you’ll also have access to critically-acclaimed series like the new Michael Fassbender series The Agency, the first two seasons of Yellowjackets (whose third season premieres on Valentine’s Day), plus Paramount+ with SHOWTIME’s massive library of films. Use the link below to subscribe to Paramount+ with SHOWTIME!

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What is the plot of Dexter: Original Sin?

The new series briefly picks up where Dexter: New Blood left off – according to showrunner Clyde Phillips, a sequel to that series entitled Dexter: Resurrection will start shooting in January, with a premiere date in June 2025 – before flashing all the way back to Dexter’s birth. Original Dexter Michael C. Hall provides voiceover narration for all of these events, before the show once again skips ahead in time to 1991, when an adolescent Dexter (played by Patrick Gibson of The Tudors and The OA) is first getting his hands wet…in the viscera of a cadaver.

The rest of the pilot establishes youthful versions of classic Dexter favorites like his sister Deb (Molly Brown), Miami PD coworkers María LaGuerta (Christina Milian), Angel Batista (James Martinez), and Vince Masuka (Alex Shimizu), as well as Dexter’s father/ mentor Harry Morgan (Christian Slater). Unlike the more reflective vibe of Dexter: New Blood, this new series is a lot closer to the dark yet humorous tone of early Dexter seasons.

Who is in the Cast of Dexter: Original Sin?

Beyond the actors listed above, Dexter: Original Sin features ‘00s stars like Patrick Dempsey as police captain Aaron Spencer and special guest star Sarah Michelle Gellar as Tanya Martin, the CSI Chief who becomes Dexter’s boss by the end of the pilot. Here’s a full look at the cast:

• Patrick Gibson as 20-year-old Dexter Morgan
• Michael C. Hall as the inner voice of Dexter Morgan
• Christian Slater as Harry Morgan
• Molly Brown as 16-year-old Debra Morgan
• James Martinez as Angel Batista
• Christina Milian as Maria LaGuerta
• Alex Shimizu as Vince Masuka
• Reno Wilson as Bobby Watt
• Patrick Dempsey as Aaron Spencer
• Sarah Michelle Gellar as Tanya Martin
• Joe Pantoliano as Mad Dog
• Brittany Allen as Laura Moser
• Randy Gonzalez as Santos Jimenez
• Aaron Jennings as Clark Sanders
• Raquel Justice as Sofia
• Jasper Lewis as Doris Morgan
• Carlo Mendez as Hector Estrada
• Isaac Gonzalez Rossi as Gio
• Roberto Sanchez as Tony Ferrer
• Amanda Brooks as Becca Spencer