I missed this series and my father recently told me about it as well as another TV series called "Bodyguard". Have only seen Series 1 of "Line Of Duty" so far but have been very impressed by all aspects of it. The punchy storyline, acting and realism have been first class and am looking forward to seeing all the series now. I won't return to this thread until I have seen all of both mentioned above in case there are any spoilers!