The first ten minutes of the first episode is the only reason I'm giving this five stars. Somehow, the acting is wooden, devoid of any humour or dynamism. The humour remark may jarr with some but, let's be honest here, when faced with life changing, heartbreaking situations, the human condition is to add some levity. And I mean that on a minute level, not as an overarching thing. Potentially detonating bombs on city streets obviously isn't funny but, watch this show just to see how clinical it is.

The dialogue is sixth form play level. Choice examples:

"I'm not the queen. You CAN touch me"

"oh please don't be one of those blokes who's intimidated by women who are more powerful than them". Delivered by the Home Secretary. To a close protection officer! Really?

I wasn't sure about Richard Madden in Game of Thrones. Now I'm absolutely certain. Not for me. Nor this show.