Watching Cottage To Let one can hope that Leslie Banks learns a valuable lesson. That no matter how much privacy he craves in his work during war time other considerations like security prevail. Of course being kidnapped by the Nazis might be a learning experience.
That's what happens here in Cottage To Let, a wartime British film taken from a stage play by actor/writer Frederick Kerr. Banks lives with wife and daughter at a Scottish estate with the usual gang of servants, a young evacuee from the London blitz George Coe and he has his one assistant Michael Wilding for his scientific research which is now directed toward inventing a new 100% accurate bomb sight for the RAF. And from the RAF he has a downed flier from the Battle Of Britain, Flight Lieutenant John Mills.
Other than Banks and Coe, absolutely no one is who they seem to be. Some are spies, some are security, the trick is to figure out which is which and I guarantee you won't be 100% right. Even Coe who says that his hero is Sherlock Holmes "the smartest man whoever lived" doesn't get it right though his suspicions do lead to the unmasking of who is who.
Even though Cottage To Let is dated and fixed in the time of wartime UK it still is quite enjoyable with some really good performances.