Harold Finch is a fictional character from the CBS crime drama television series Person of Interest. He is played by Michael Emerson, and in scenes from his past by Parker Brightman (child) and Chris Bert (teenager). Finch is a reclusive private billionaire software engineer who developed a machine that can isolate the Social Security numbers of people with either premeditated homicidal intent or who will be homicide victims, based on its analysis of surveillance data. He recruits John Reese, a former Green
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