Just seconds before a building is demolished, a mysterious mute child that has been living alone underground is discovered. When the FBI's Fringe Division investigates, the boy forms an unspoken connection with Agent Olivia Dunham. Meanwhile, an especially gruesome serial killer resurfaces and showcases his "artistry" by displaying his work publicly. As the boy gradually assimilates into a new environment, Olivia and the team must race against the clock to prevent the mad man from further macabre. Guest Cast: Jeremy Shamos as The Artist; Spencer List as The Child; Matt Mulhern as Dennis; Alicia Goranson as Tattoo Girl; Carolyn Feldschuh as Older Woman; Jimmy Palumbo as Mike; Erik Palladino as Eliot Michaels; Nelson Pena as Junior Agent; Robert Payne as Agent; Victor Williams as Phil; Phil Nee as Archie; Sandra Daley as Dr. Winick; Mary Lou Schriber as Nurse.9 p.m. Tuesday. Fox.