Elite agents of an international spy agency with no memory of their past, a rival agency with the objective to destroy the core of Citadel, the series is peppered with a lot of action, drama and at the heart of it, is also about two lost lovers reuniting. As quoted by Richard Madden, “I think oftentimes, we see shows that are 80% drama, 20% action, or vice versa. And this show aimed to be 100% of both. And I think that’s what we’ve managed to pull off, ‘cause, in the middle of these huge sequences with explosions and cars blowing up and all of that, I don’t want to spoil it for you, we have this really kind of intimate drama between these two characters and how they dance together.” An edge-of-the-seat action with a plethora of secrets and deceptions, Citadel is filled with all the thrills that make it impossible to look away from the screen.