A new "Dexter" prequel is making its way to Paramount Plus, and the show has just locked down a massive star. Sarah Michelle Gellar has joined the cast to play a young Dexter Morgan's boss at the Miami Metro Police Department.
"Dexter: Original Sin" dives into the backstory of Dexter and his Dark Passenger. As it's a young version of the serial killer, Michael C. Hall will not reprise his role as the titular character. Instead, Patrick Gibson will play him. Since it's a prequel, you should be able to jump in even if you haven't seen the other "Dexter" shows.
