Person of Interest
In the beginning, John Reese, a former Green Beret and CIA operative, is living as a vagrant in New York City after the death of the woman he loves, and is presumed dead. He is approached by Harold Finch, a reclusive billionaire software genius who is living under an assumed identity. Finch explains that after September 11, 2001, he built a computer system for the government that uses information gleaned from omnipresent surveillance to predict future terrorist attacks. However, Finch discovered that the computer was predicting ordinary crimes as well. The government is not interested in these results, but Finch is determined to stop the predicted crimes. He hires Reese to conduct surveillance and intervene as needed, using his repertoire of skills gained in the military and the CIA. Through a backdoor built into the system, Finch receives the Social Security number of someone who will be involved in an imminent crime, at which point he contacts Reese. Without knowing what the crime will be, when it will occur, or even if the person they were alerted to is a victim or perpetrator, Reese and Finch must try to stop the crime from occurring.