Jim Caviezel John Reese Actor Michael Emerson Harold Finch Actor Taraji P. Henson Joss Carter Actor Kevin Chapman Lionel Fusco Actor Sarah Shahi Sameen Shaw Actor Amy Acker Root Actor Clarke Peters Alonzo Quinn Guest Star David Alan Basche Wayne Kruger Guest Star Gary Basaraba Stu Sommers Guest Star Leslie Odom Jr. Peter Collier Guest Star Paul Urcioli Barry Timmons Guest Star Brian Wiles Officer Mike Laskey Guest Star Shannon Sullivan Karen Mills Guest Star Bradford Cover Matthew Hayes Guest Star Tom Tammi Neal Jenkins Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer Erik Mountain Writer Frederick E.O. Toye Director