This intrigues me, what's it about, in a nut shell?
Short Answer Wikki Entry
It's a show on CBS here in the states. The premise is after 9/11, a computer engineer (Harold Wren, and that is NOT his real name..we don't know it) invented a machine for the government to scan all the online transactions/video/phone calls/emails/tweets, ect to locate potential threats like the 9/11 hijackings. Thing was it came up with OTHER names as well. Names that were tied to people who were either the victims/perpetrators of murders before they happen.
Harold designed the 'Machine' to be a closed box system. It can't be manipulated after it was encrypted and all that you do is put in the feeds and it spits out the numbers. Two sets. Relevant ie.. terrorists go to the government. Irrelevant Numbers go to Harold, who brought in 'Mr. Resse' (a former soldier/intelligence operative) to help him save people/prevent these murders. He purposely restricted his access to the Machine by having it CALL him thru payphones in NYC with just social securty numbers. That's all he gets.
There are a variety of storylines.. the 'HR storyline', which covered 3 seasons has just ended for the most part. With some very telling results but it's not the only storyline thread that weaves thru the series.
You get flashbacks that tie into the storylines and the episodes. Harold's past comes up. Ditto Reeses. Even some of their allies and enemies get flashbacks courtesy of the Machine. You get 'snapshots' into why they are they way they are..how they've changed, why they do what they do. Harold's past drives him particularly harshly at times. You see him before the machine, during it's creation, and ..after the incident that made him the driven man he is now.
You see that haunted look at the funeral in this clip