Scraps of information are gathered and pieced together by an enemy who lurks in the shadows, proving that nowhere is safe to discuss sensitive wartime information on the home front.
It is surprising that even in 1943 the government were issuing shorts preaching that careless talk costs lives.
They knew that there were no German spies on this country.
In fact the Germans would have been more able to reach conclusions from radio traffic than from careless talk.
Add our editors' Netflix movie and TV picks to your Watchlist. Our recommendations include new Shonda Rhimes-produced drama series "Bridgerton," David Fincher's Mank, and more.