John Lithgow returns as Trinity Killer in 'Dexter: Resurrection.'

Showtime's "Dexter: Resurrection" will feature John Lithgow returning as the Trinity Killer, Arthur Mitchell, despite his character's previous death in Season 4. Lithgow confirmed he will appear as a phantom in Dexter's storyline. The revival has also added new cast members, including Krysten Ritter and Peter Dinklage, alongside returning actors like Uma Thurman. Filming is ongoing, and the series is set to premiere this summer. Lithgow's return raises questions about the character's fate, as he was thought to be dead. His appearance will be part of Dexter's journey, which continues after surviving a hurricane.