How to rate a series that runs hot and cold, sometimes it's an 8/9, sometimes it's 3/4, ugh. Why can't the showrunners be consistent? There's a lot to like with this short 6 episode series, production values are good, actors are good, the scene music is decent, and the overall storyline is good. There are some genuinely tense moments, too. Neither good nor bad though is that it's a UK series so lots of accents and dialects that can be hard to square without subtitling. It's so funny that the men call boss women "mum", is that a maternal thing?! Americans will also need to hit wikipedia about the UK agencies and roles that are central. So, the first five eps I'd rate an 8, but the final episode was so obvious in its need to wrap up all the loose ends that it was just a horrible experience, so much poorer than the others, and it gets a 4. But the final episode of any series gets much more weight since that's largely what you walk away with, so it reduces the overall rating to a 5, not only because everything was rushed at the end but there was a fair amount of uncharacteristic implausibility that ruined its authenticity. If there is a second season, it'll need to be an entirely different plot with hopefully a better showrunner and a stronger commitment to authenticity and proper pacing to the end.