Dexter: Original Sin – The Surprising Big Bad's Motives as the Kidnapper Explained

The latest episode of Dexter: Original Sin has fans questioning the villain's true motives.

This article contains spoilers for Episode 7 of Dexter: Original Sin.

Seven episodes into Dexter: Original Sin, and as we inch closer to the season finale, the twists keep coming. Recent interviews with the cast have hinted at even more surprises ahead, but Episode 7, titled "The Big Bad Body Problem", has already left fans reeling with its shocking revelations.

The Big Bad's Identity: Aaron Spencer Exposed

In an unexpected turn of events, Aaron Spencer (played by Patrick Dempsey), the Captain of Miami Metro Homicide, is revealed as the child kidnapper. This revelation is shocking not only because a high-ranking law enforcement officer is behind these abductions but also because one of his victims is his own son, Nicky.

Throughout the season, Spencer's unstable personality and erratic behavior have been evident. However, Episode 6 ("The Joy of Killing") provided major clues—his emotional outbursts over Nicky’s abduction, which seemed to hinder the investigation, were all part of an elaborate act to deceive his colleagues. Now, the question remains: Why would he do this?

Aaron Spencer’s Motives: Why Did He Target Jimmy Powell and His Own Son?


While the exact reasons behind Spencer's actions remain undisclosed, answers are likely on the horizon. The Dexter franchise rarely leaves loose ends, so fans can expect some shocking explanations soon. Here are some possible motives behind Spencer’s involvement in Jimmy Powell’s murder and Nicky’s kidnapping:

1. A Desperate Attempt to Reunite with His Ex-Wife

Aaron Spencer still harbors feelings for his ex-wife, Becca Spencer (played by Amanda Brooks). His bitterness over their failed marriage was evident when Becca confronted him about his apparent lack of interest in Nicky. Perhaps, by kidnapping their son, Spencer hoped to reignite a shared sense of grief and urgency—bringing them closer in the process.

2. Revenge Against His Ex-Wife and Her Fiancé

Another theory suggests Spencer’s actions are driven by revenge. Becca’s infidelity, which has spanned over 14 years, may have fueled deep resentment in Spencer. His son's kidnapping could be a way to punish Becca and her fiancé, making them suffer for the betrayal he endured.


3. Nicky Might Not Be His Biological Son

A popular fan theory suggests Spencer recently discovered that Nicky is not his biological son. Becca’s long-term affair raises the possibility that her fiancé is actually Nicky’s father. If Spencer believes this to be true, it would explain his emotional detachment and his drastic actions.

4. A Smokescreen to Take Down the Cartel

One theory moves away from personal motives and suggests a calculated strategy. From early on, Miami Metro suspected a cartel connection, particularly since the first victim was the son of a high-profile judge. Spencer has been working on cartel-related cases for years, potentially making him (and his son) a target.

What if he orchestrated these kidnappings to frame the Los Tigres cartel? By doing so, he could manipulate Miami Metro into launching a full-scale crackdown against them. If true, Spencer’s actions were not just about personal vengeance—they were part of a larger plan to eliminate a criminal empire.

Will Aaron Spencer End Up on Dexter’s Table?


The closing moments of Episode 7 suggest that Dexter is already envisioning plastic wrap in Spencer’s near future. But will he actually go through with it? And how will Harry react when he learns Dexter is planning to take down the captain of Miami Metro PD?

One thing is certain: the remaining episodes of Dexter: Original Sin promise to be a wild ride. Stay tuned for more shocking revelations as the season unfolds.

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