It's a film noir that's never really noirish enough; an espionage thriller that never bothers to be thrilling.

An espionage thriller rich in complexity and ambiguity.

After the frenzy of the previous episodes, the pace slows in the penultimate episode of the fourth season of the espionage thriller, but the tension remains at breaking point.

I suspect that nobody can make a good wartime espionage thriller any more, because we have become too cynical about heroism, selfsacrifice and good and evil.

You had to keep reminding yourself — not difficult when his family's distress was occasionally all too plain — that this was real life and not an espionage thriller.