Someone mentioned it in a blog of mine a while back & I was like...hmm....& started watching.
If it wasn't for the writing & characters I would have given up. Do American cops live in a time warp? British policing is leaps & bounds in-front of yours...yes you have better technology....but look at the cops in the '70s in Britain & then look at your FBI, they been sharing tips I swear.
Also the whole math thing feels like it was tacked in at the end...it doesn't have any need to be in teh show & no real reason either & after the first few eps basically the Math never works because you cant do it on living people!...meh.