Will Hay plays a bumbling schoolmaster, mistaken for a genius, who happens to be a Nazi master spy. Wartime comedy directed by Basil Dearden, co-starring John Mills and Basil Sydney.   Will Hay plays Professor Davis, the intrepid head of a correspondence college, in this wartime comedy. Davis gets wind of the fact that a Nazi spy has infiltrated an economic delegation with the intent of undermining attempts to reach a trade agreement between Great Britain and certain South American countries. The effort to expose the dastardly fellow sees Hay adopt various disguises in a steady onslaught of mistaken-identity comedy. Synopsis A professor discovers a Nazi agent, posing as an economics expert, who is trying to prevent a trade treaty being signed between England and South America. Running Time: 74 minutes Region: Region 2 Release Date: 7 Feb. 2011