If you enjoy the WWII classic films SABOTEUR and THE 39 STEPS, you will love this film. The dialogue is taut, the acting superlative by all players, with Dame Judi Dench and Eddie Izzard heading a uniformly gifted cast. The direction is perfect: no excesses, but ample and balanced time given to every aspect of the film. And the gorgeous Welsh scenery! The landscape, in fact, is an important cast member, in that it displays both the idyllic beauty of Britain and its vulnerability in the face of too-close Germany's plans to annex or subjugate England. An edge-of-your-seat viewing experience, with mounting tension until the very, very satisfying conclusion.