This is a scene from "Aletheia." It's the first episode of 2014 for Person of Interest.
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Finch does his best to ward off POI's enemies on Person of Interest. "Alethia" is the 12th episode of the show's third season.
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Person of Interest Season 3 Episode 12 Quotes

There's a time for a hammer and a time for a scalpel. It's hammer time.

Shaw

Nothing wrong with jail. Some of the best vacations I ever had were behind bars.

Reese