"Baby Blue" -- When The Machine spits out the number of a 6-month-old baby, Reese (Jim Caviezel) and Finch turn into overly protective parents - with an arsenal at their disposal. Meanwhile, when Elias resurfaces, Detective Carter begins to question her new allegiance with Reese and Finch, on PERSON OF INTEREST, Thursday, March 8 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Photo: John P. Filo/CBS â?Â¬Â©2012 CBS Broadcasting Inc. All Rights Reserved.