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 Julian Ovenden Jeremy Lambert Guest Star Anne Carney Nurse Guest Star Eyas Younis Hamid Guest Star Andrew MacLarty Bobby Jackson Guest Star James Riordan Dr. Aaron Wendell Guest Star Brian J. Carter Stewart Guest Star Kim Ramirez Briggs Guest Star Jabari Gray Murrow Guest Star Evan Leone Lead Op Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer Lucas O'Connor Writer Denise Thé Writer Chris Fisher Director