A new trailer for the prequel series for "Dexter" has been released. "Dexter: Original Sin" is the backstory of blood-spatter expert/serial killer Dexter Morgan, which was previously hinted at in flashbacks during the original hit series. "Original Sin" features "Dexter" star Michael C. Hall in voice-over mode as he narrates his own back story, of how the adopted son of a Miami cop becomes a serial killer, with the guidance of his father. The series premieres December 13 on Paramount+ with Showtime. It will also air on Showtime beginning December 15. See the trailer for "Dexter: Original Sin" below...