Since her impressive performance on Mad Men, Elizabeth Moss continues to make smart choices that result in compelling performances. In this series, she takes on a British accent and some action scenes, as a government agent assigned to get the details of a terrorist attack by befriending the potential leader (Yumna Marwan). Their relationship is the core of the story, as they navigate danger and double-cross from all sides. There are some well-staged action beats and Moss rises to the challenge with force. Showrunner Steven Knight (Peaky Blinders) has some subplots and sidetrips that slow down the narrative and, like so many current series, it would have made a tighter 4 episodes. Even through the intrigue and doubt, Moss is the main reason to watch this. (Six one-hour eps). (2.5 / 5)