'Person of Interest' episode ‘2 Pi R’ recap, review: Finch, Carter highlighted 

'Person of Interest' episode ‘2 Pi R’ recap, review: Finch, Carter highlighted in Reese’s absence
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"2πR" -- Finch (Michael Emerson, right) goes undercover at a high school as a substitute teacher to save a teen genius (Luke Kleintank, left) whose number has come up, on PERSON OF INTEREST, Thursday, Jan. 3 (9:00-10:00 PM ET/PT) on the CBS Television Network. Photo: Giovanni Rufino/Warner Bros. ©2012 Warner Bros. Television. All Rights Reserved.
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