WARNING! This article contains SPOILERS for Dexter: Original Sin season 1, episode 5!While there are plenty of familiar faces at Miami Metro in Dexter: Original Sin, some figures from the original series have surprisingly been left out, creating some timeline inconsistencies. The majority of Dexter: Original Sin’s cast of characters is made up of younger versions of figures from the main Dexter series, which include names like Dexter, Harry, and Deb Morgan, Angel Batista, Vince Masuka, and Maria LaGuerta. Since Original Sin’s timeline kicks off in 1991, the prequel highlights some fascinating ways that Miami Metro transforms in the 15 years before Dexter’s series premiere, such as with personnel and procedures.

https://screenrant.com/dexter-original-sin-captain-thomas-matthews-missing-explainer/