It's some Bad Code (Person of Interest)

"Bad Code" (202)
The search for Finch and ROOT takes Reese and Carter to Texas to search for clues about a cold case involving the disappearance of a young girl. 
Original Air Date Oct 4, 2012

Every plan needs a Contingency (Person of Interest)

"The Contingency" (201)
The Machine continues to send Reese numbers according to Finch's contingency plan but Reese is more concerned with finding Finch even without the Machine's help.

A series of flashbacks recap our story so far as well as provide a little more history into The Machine as we see Finch from the system's POV on Jan 1, 2002 which is labeled Day 1. He's testing The Machine's facial recognition and labeling systems. We quickly move through scenes of Finch and Nathan, Alicia Corwin and Nathan etc until we reach Day 3550 where Finch tells Reese he has built in a contingency should anything bad happen and then Day 3791 when Finch was kidnapped by the hacker ROOT.