Wry comedy and thriller are combined in the Launder-Gilliat (Green for Danger) tradition, with Alastair Sim as the evenhanded clockmaker whose true calling is killing. Bent on liquidating a cabinet minister, the hired assassin makes his way to the gentleman's trysting spot--a country inn called The Green Man--where he is foiled by a host of droll characters ranging from a vacuum cleaner salesman to a BBC radio announcer to the pompous politician himself (Raymond Huntley). The latter momentarily effects the title role when, in a deliciously distasteful scene, he is thrown off his romantic course by the inn's specialty of the house: chopped toad.