Showtime has cast David Dastmalchian ( Oppenheimer) in Dexter: Resurrection in the guest starring role of “Gareth.” Production on the Dexter: New Blood followup series kicked off in January in New York and is set to premiere this summer on Paramount+ with Showtime.

March 4 (UPI) -- Showtime announced Tuesday that Neil Patrick Harris will guest star in Dexter: Resurrection. The show is expected to air this summer on Paramount+ with Showtime.

David Dastmalchian has joined the cast of “ Dexter: Resurrection ” as a guest star. Details about the “Late Night With the Devil” star’s role are unknown, other than his character’s name: Gareth.

Now David Dastmalchian has been cast as the guest role of Gareth in the revival series "Dexter: Resurrection." Read More: Sitcom Star Joins 'Dexter: Resurrection' as Possible Serial Killer At this point nothing more than Dastmalchian's character's first name is known,