Taking from a Hindu proverb we get the episode titled: :Matsya Nayaya". Basically, the bigger fish eat the smaller fish, or survival of the fittest. This one is about trusting no one and always covering your back as there are plenty of threats seen and unseen...And, those threats never really end, they can come back in different forms.
The story starts off with a simple lover's betrayal in a bar in which one crossed lover attempts to kill he who betrayed her. Reese spoon feeds the perpetrator to Carter, but this is just a pale imitation of what follows. Finch believes an armored truck is about to be hit as the name of one of the guards comes up. Reese assumes the role of the guard's new partner. Just as most things are not so cut and dried Reese narrowly escapes death as his partner is the one who is the inside man for the heist. We see flashbacks with Reese and a CIA female partner in China where the goal was not as they were told which was to retrieve a laptop with a covert program, but to eliminate them both in the field. It was thought to be successful until Reese turned up very much alive yet continually out of the CIA's reach. The heist ends up implicating the police's dirty HR dept. too and Fusco's allegiance is tested to which he passes with flying colors by saving Reese's life. Finally, the CIA is closing in on Reese, but there's one thing the two point men didn't count on and that's the big surprise as the episode ends.
Person of Interest continues to be an excellently written and acted show. Like any slightly fantastic premise one could shot holes here and there, but for the most part those are small gripes and simply do not take anything important from the sum total. Caviezel and Emerson prove with might and technology behind them they are the bigger fishes.