A pukka adaptation of Graham Greene's wartime thriller as a regiment of German paratroopers, disguised as RAF Engineers, infiltrate a remote town, but suspicions gradually arise amongst the townsfolk. Housewives find themselves killing the enemy with an almost hysterical relish and any film that includes Thora Hird as a flighty seductress has to be worth watching. Tense, realistic drama with a cold and brutal depiction of wartime subversion. Superb.