Jim Caviezel John Reese Actor Michael Emerson Harold Finch Actor Kevin Chapman Lionel Fusco Actor Sarah Shahi Sameen Shaw Actor Amy Acker Root Actor Brett Cullen Nathan Ingram Guest Star Carrie Preston Grace Hendricks Guest Star Robert Manning Jr. Zachary Guest Star Ned Eisenberg Detective Joseph Soriano Guest Star David Aaron Baker S.A. Martin LeRoux Guest Star Lisa B. Tharps IAB Agent Glenda Sumner Guest Star Dikran Tulaine Bella Durchenko Guest Star Mason Alban AK-12 Guest Star Michael Blaustein Club Kid Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer, Writer Tony Camerino Writer Chris Fisher Director