"3D Spies of WWII" is a wonderful and fascinating look at a seldom discussed aspect of war--reconnaissance. Of course, you hear about soldiers dying, naval and air battles and the like but not the seemingly mundane behind the scenes work needed for the war effort. This film specifically focuses on a British unit whose job it was to take 3-D footage of German territory and, most importantly, interpret it so they'd understand exactly WHAT this data actually is. This sort of work was instrumental in three major projects talked about in the film: the dam busting on the Ruhr, gathering intel for D-Day and the German V-1 and V-2 rocket programs. And, for their efforts, these folks were instructed NOT to talk about their work!
This film kept my interest as well as my wife's. It was exceptionally well made and is well worth your time. My only other comment is that it was very, very sad that folks in charge of the Peenemunde site (which was responsible for the deaths of about 20,000 slave laborers) were never really punished as scientists like Von Braun were considered too important for future rocket programs!