I know some people watch this season already some people don't know about this season . may be some people do not like it . some are love it. actually personally i love this season so i think of share this details with you.
This is a story about a genius computer scientist who expert in AI , a multi billionaire Harold Finch. who was once a hacker who put a net all over internet just before WWW launched . (Actually his identity still unknown) and he with his partner build a machine after 9/11 incident that use each and every servialance camera to watch and predict future terrorist and crimes.after they build it US government kill his partner and he also caught to the bomb but he is somehow survived.
But the machine he build have a back door. it give a government details about terrorist and it gives Harold the details about crimes happening locally. he meet a ex -CIA and ex-Special forces guy who also labeled as a dead guy in US government. theoretically they both not exist in the world ..
so no need to narrate the story hope everyone can enjoy it. actually i believe nowadays computer science and AI its not impossible to build such a machines . there are area's with machine learning and neural networks actually building such a machines . nice different theme story. hope everyone get time to watch it in this summer and i believe its worth watching