Warning: This story contains MAJOR SPOILERS for Episode 7 of Dexter: Original Sin Season 1.

After a planned one-week hiatus, Dexter: Original Sin returned with Episode 7, “The Big Bad Body Problem,” taking fans deeper into the chaos and darkness surrounding Dexter Morgan and Miami Metro. Picking up directly where the previous episode left off, Dexter finds himself in trouble after committing his third kill—cementing his status as a serial killer. Complications arise when Alligator Alley, where he disposed of his first two victims, becomes an active crime scene.

This episode delivers a mix of suspense, comic relief, and shocking twists, with the spotlight shifting to the high-profile child abduction case that has rocked Miami Metro.

The Miami Metro Abduction Case

The storyline gained momentum in Episode 2, when 10-year-old Jimmy Powell, the son of a prominent Miami Metro judge, was abducted. As a high-profile case, it dominated the news and escalated tensions within Miami Metro.

 
Episode 3, titled “Miami Vice,” opened with a fiery press conference by Captain Aaron Spencer (played by Patrick Dempsey), who vowed on live TV that the kidnappers would “pay the ultimate price.” Tragically, 12 days later, Jimmy’s body was discovered hanging from a bridge in a gruesome display.

The kidnapper struck again, this time targeting someone even closer to home—Spencer’s own son, Nicky. In the previous episode, “The Joy of Killing,” viewers witnessed a masked assailant attacking Becca Spencer and abducting Nicky. This pushed Aaron Spencer into a state of despair and anger, with his emotions spilling over into the investigation.

The Big Reveal: Who Is Dexter: Original Sin Season 1’s Big Bad?

In the latest episode, the kidnapper sends a chilling message to Miami Metro: Nicky’s severed finger arrives in a small box. While examining the evidence, Dexter, Tanya, and Masuka notice two key details—the kidnapper hesitated while cutting Nicky’s finger, and a drop of blood outside the box leads to a breakthrough.

In a shocking twist, the episode concludes by revealing the kidnapper’s true identity: Captain Aaron Spencer. This jaw-dropping development left fans questioning how a father—and a respected homicide captain—could commit such heinous crimes against his own son.

What’s Next for Dexter?

The final moments of the episode hint that Dexter is already connecting the dots. Noticing an injury on Spencer’s hand that matches the blood found on the box, Dexter is convinced that Spencer is the perpetrator. Will Captain Aaron Spencer end up on Dexter’s table? And how will Harry’s code factor into this complex moral dilemma?

Big Bads and Bigger Questions

 
The season isn’t done delivering shocking twists. Could Aaron Spencer have an accomplice, or is he acting alone? Meanwhile, another major case looms—the NHI killings, which Dexter and LaGuerta suspect are the work of a serial killer.

Final Thoughts

Episode 7 of Dexter: Original Sin kept fans on the edge of their seats, blending character-driven drama with nail-biting suspense. As theories about Spencer’s motives and the NHI case swirl among fans, one thing is certain: this season of Dexter is far from over.