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