Make no mistakes about it--Person of Interest is just another procedural, wrapped up in technology and action to lead the viewer astray. So there's this machinethat spits out SSNs for Finch, who gets Reese to help him. The two man show is lacking in anything substantial and neither of the characters seem interesting. Reese, frankly, is disinterested all the time, even when kicking butt.
There's also this stupid gimmick with machine in which it doesn't say why it provided the number. It's basically a plot device that allows more mystery in episode. When writers go to such lengths, making the machine stupid in order create interesting situations, there's a big problem.