Sarah Michelle Gellar Joins 'Dexter' Prequel 'Original Sin'

The 'Buffy' alum will play CSI Chief Tanya Martin, Dexter's new boss, in the 1991-set series.

Gellar's role marks her return to Showtime/MTV Entertainment Studios family.
The series follows a young Dexter Morgan, portrayed by Patrick Gibson, as he evolves into a serial killer.
Christian Slater stars as Dexter's father, Harry Morgan, guiding him in his dark transformation.
Patrick Dempsey, Molly Brown, and Christina Milian are among the notable cast members.
The showrunner Clyde Phillips returns, promising a compelling origin story for the iconic character.