The Fringe alum will play "The Cowboy," one of Red's (James Spader) many assets. But when Red gives him a new assignment, the results will leave Red in shock.
Reddick — whose recent credits include American Horror Story: Coven and Intelligence — will appear in the same episode as Dianne Wiest, who was recently cast as the head of Amnesty United, an organization created to fight the death penalty.