From Desperate Housewives creator Marc Cherry, the project centers on a small Tennessee town that is being torn apart by the forces of good and evil. However, things change when a stranger arrives, possibly bringing peace back to the community.
His casting comes after his NBC pilot with Lost co-star Michael Emerson was pushed back.
Hallelujah would be O'Quinn's third series gig at ABC. He recurred on the second season of Alias before joining Lost in 2004. He won an Emmy for Best Supporting Actor for Lost in 2007.