Jim Caviezel John Reese Actor Michael Emerson Harold Finch Actor Kevin Chapman Lionel Fusco Actor Sarah Shahi Sameen Shaw Actor Amy Acker Root Actor John Nolan John Greer Guest Star John Doman Sen. Ross Garrison Guest Star Brett Cullen Nathan Ingram Guest Star Robert Manning Jr. Zachary Guest Star Michael McGlone Detective Bill Szymanski Guest Star David Aaron Baker S.A. Martin LeRoux Guest Star Michael Potts Travers Guest Star Ebon Moss-Bachrach Michael Cole Guest Star Jean Brassard Emile Bertrand Guest Star William Popp McManus Guest Star Alex Manette Barnett Guest Star Patrick Byas Guard Guest Star Pasha Pellosie Desk Guard Guest Star Fisher Neal Sgt. Neal Guest Star Alfredo Narciso Patrol Uni Guest Star Tristao Darius Valet Guest Star Lorrie Odom Woman Guest Star Marlon Perrier Security Agent Guest Star Jeremy Burnett Samaritan Op Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer, Writer, Director Erik Mountain Writer