Last night , Begoña and I had the opportunity to watch the last episode of season fourth, bringing an end to the series, for now. Thus, I’m in a position to claim that Line of Duty is one of the best series I have seen this year. Unfortunately, we will have to wait a little longer than usual for the show’s fifth run. Speaking to The Mirror, Mercurio said: “The plan is we won’t shoot Line of Duty series five until next year and that means it won’t be on air until 2019.“ Meanwhile I strongly recommend this series to everyone. If you have seen the series here, you can find a guide episode by episode. Since the entries may content spoilers, it is advisable to read them after seeing each particular episode.