Fans are eagerly anticipating the release of the Dexter prequel series, with filming underway, with a likely release date sometime in 2025. Patrick Gibson has been cast as a younger version of Dexter Morgan, alongside Christian Slater as Harry Morgan and Molly Brown as Debra Morgan. Patrick Dempsey and Sarah Michelle Gellar have also joined the cast of Dexter: Original Sin as brand-new characters, but there is one key character from the original series who has yet to be cast, causing concern about the direction of the prequel series.