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 Leslie Odom Jr. Peter Collier Guest Star Yul Vazquez Cyrus Wells Guest Star Colin Donnell Billy Parsons Guest Star Peter Rini Dr. Stephen Carr Guest Star Steve Lord Skinhead Guest Star Matthew Stocke Courier Guest Star Danielle Di Vecchio Capt. Rosa Divecchio Guest Star Alex Shimizu Daizo Guest Star Joe Gately Guard Guest Star Rose Sias Uni Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer David Slack Writer Jeff Gibson Director