If you are looking for a realistic portrayal of WWII and the German occupation of Norway, perhaps this isn't the best film ("The Heroes of Telemark" is probably better for that). This is NOT a criticism of "The Moon is Down"...in fact it's a very good film and did its job of inspiring the American people during WWII.
The film is set in Norway just before the German invasion of 1940. The townspeople in a small mining town are all happy and oblivious to the coming stampede. Soon Nazis flood the country and their leader in the town (Cedric Hardwicke) has one goal...total obedience from the people. To do so, they'll kill as many people as they need to in order to keep the iron mine opening and running at capacity. But the locals cannot stand their new German overlords and throughout the film, they work to undermine the occupiers...even at the risk of their lives. This all leads to a VERY rousing finale-- one that still packs a powerful punch today.
This Twentieth Century Fox film is interesting because it shows the Germans as being brutal...but no more so than they actually were in their occupied territories! Instead of focusing too much on this, the movie really centers on the resistance of the Norwegians. An inspiring and well made film based on a story from John Steinbeck of all people. Well worth seeing.