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 Camryn Manheim Control Guest Star Andreas Damm Romeo Guest Star John Doman Sen. Ross Garrison Guest Star Wrenn Schmidt Dr. Iris Campbell Guest Star David Valcin Scarface Guest Star Cara Buono Martine Rosseau Guest Star Winston Duke Mini Guest Star Annie Ilonzeh Harper Rose Guest Star Adria Arjona Dani Silva Guest Star Jamie Hector Link Cordell Guest Star Nick Tarabay Devon Grice Guest Star Jessica Pimentel Floyd Guest Star Louis Lourens Samaritan Representative Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer, Writer Dan Dietz Writer Amanda Segel Writer Denise Thé Writer Lucas O'Connor Writer Erik Mountain Writer David Slack Writer Andy Callahan Writer Frederick E.O. Toye Director Melissa Scrivner-Love Writer Stephen Surjik Director Kenneth Fink Director Michael Offer Director Chris Fisher Director Richard J. Lewis Director