This seems a very promising show from Netflix and BBC. Great performances. It also promises a great and convoluted plot (well at least at the beginning). But the only thing which doesn't work for me is the slow pilot and the finale (which is a failure on disastrous level). The show is surprisingly interesting in the middle episodes but doesn't maintain that pace in the end. Not to mention the not so "climatic" climax. Feels like themes gets all botched up somewhere. And the once seemingly deep plot gets mired up in cliches. I believe the writers tried to serve too many things in the plate at once which backfires in the end. Leaving them a pathetic final act. The final twist doesn't answer questions albeit raises new ones. Questions regarding the writing and the intentions of the TV show.

P.S. - Seems the BBC is still not comfortable with showing a story where a fellow minister is being killed with the help of Secret Services just for a cover up! Instead they decided to go with the arc of the age old "organised criminals" and a buttonhead jihadi. Well just an observation nothing else. Cheers.