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 Boris McGiver Hersh Guest Star Camryn Manheim Diane Claypool Guest Star Saul Rubinek Arthur Claypool Guest Star Jeanine Serralles Ross Guest Star Tom Degnan Agent Easton Guest Star Tuck Milligan Finch's Father Guest Star Parker Brightman Young Harold Finch Guest Star Nambi E. Kelley Claypool's Nurse Guest Star Joe Urban Biker 1 Guest Star Eric T. Miller Trucker 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 Richard J. Lewis Director