Person of Interest background creation
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Mark Snow: [Repeated line] Don't forget, you're behind enemy lines.
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Harold Finch: [Opening narration, Season 2] You are being watched. The government has a secret system, a machine that spies on you every hour of every day. I designed the machine to detect acts of terror but it sees everything. Violent crimes involving ordinary people. The Government considers these people "irrelevant". We don't. Hunted by the authorities, we work in secret. You'll never find us, but victim or perpetrator, if your number's up... we'll find *you*