person of interest

ok, i have to admit shelley got me hooked on this tv series. it's about a guy who built a machine that knows what everyone is doing in attempt to stop terrorists. but later he uses the machine to stop 'irrelevant people' from getting hurt. it's an interesting story line although has it's violent parts. i hate to watch violence and yet am drawn to this show. is it because they are trying to do the right thing? i'm not sure.