after the first few episodes this really caught me and I kept watching, loving the characters and the situations. Harold Finch creates a supercomputer for the government and then realises that his life is in danger, he moves stiffly and you guess that there is a story there. He finds John Reese who is ex-cia, and hiding out. The two of them use vigilante tactics and computer wizardry to hunt down people who are about to be involved in violent crimes, whether victim or perpetrator and help justice happen. They also get involved with two detectives who are both from different sides of policing.

It's interesting and learning more about the characters as the series progresses also makes it compelling watching for me. ( )