After being silent for three days, when the Machine generates numbers of six missing people, Reese, Finch, and Detective Carter realize that they are hunting a serial killer who assumes the identity of his victims.
While Shaw is abducted by Root, Finch and Reese get the number of Timothy Sloan , an estate investigator. Finch goes undercover as Sloan’s assistant while Reese continues investigating Shaw’s whereabouts.
Reese and Finch try to protect a psychologist whose unorthodox methods for helping his patients find closure could cost him dearly. Meanwhile, flashbacks reveal Finch’s fragile state in the days following the bombing that killed his best friend, Nathan Ingram.
The team receives the number of Maria Martinez , an engineer working for the international energy company HydralCorp. Maria is working to clear the name of Omar Risha , a man from Iraq suspected of being a terrorist.