Two fascinating stories from World War II. One is about Rose Valland, a French woman who worked as a spy in Nazi-occupied Paris. Her bravery saved thousands of works of art, many of which were returned to the families who originally owned them. 

Secondly, the story of German U-boat U-1206 is a doozy. The new toilet onboard was confounding, and it got the the better of the boat's commander. The result was a big blunder by the German Army.