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 James Le Gros Bruce Moran Guest Star Oakes Fegley Gabriel Hayward Guest Star Purva Bedi Maggie Guest Star Sarah Wilson Phoebe Turner Guest Star Kati Rediger Janna Turner Guest Star Christina Bennett Lind Karen Guest Star Daniel Abeles Will Guest Star Tom Wiggin Kent Turner Guest Star Russell G. Jones Howard Carpender Guest Star Dan Puck Uniform Cop Guest Star Mark Delabarre Officiant Guest Star Brian J. Carter Medical Tech Guest Star J.J. Abrams Executive Producer Bryan Burk Executive Producer Jonathan Nolan Executive Producer David Semel Executive Producer Greg Plageman Executive Producer Melissa Scrivner-Love Writer Alrick Riley Director