Jim Caviezel John Reese Actor Michael Emerson Harold Finch Actor Kevin Chapman Lionel Fusco Actor Sarah Shahi Sameen Shaw Actor Amy Acker Root Actor Enrico Colantoni Carl Elias Guest Star John Nolan John Greer Guest Star John Doman Sen. Ross Garrison Guest Star David Valcin Scarface Guest Star Cara Buono Martine Rosseau Guest Star Navid Negahban Ali Hasan Guest Star Jamie Hector Link Cordell Guest Star Eshan Bay Ben Hasan Guest Star Frederick Weller Novak Guest Star Michael J. Burg Department Store Floor Manager Guest Star Tama Filianga Lowlife Guest Star Jason Alan Carvell NYPD Officer Guest Star Andrew Polk University Department Chair Guest Star Shawn Parsons Positivity Speaker Guest Star Gregory Konow Beat Cop Guest Star Leopold Manswell Wood Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer, Writer Erik Mountain Writer Richard J. Lewis Director