Continuity mistake: When Linda Voss and the children return home from the city (after the bombing) and are greeted outside by Franze-Otto Dietrich, Linda has her watch on her right wrist (as she is a lefty). As Dietrich and the children are heading into the house, you see a close up of Linda checking the time on her watch and it is on someone's left wrist. When she subsequently goes into the basement to look around, the watch is back on her right wrist again.
Factual error: In the scene where Nina is in the "secret room" in the basement of Franz Dietrich's mansion and is taking photos of secret documents with her spy camera, one of the documents she photographs details the location of the secret bomb-making factory at "Peenemuende". The location of Peenemuende on the map is marked as being in the midwest Ruhr region of Germany, whereas Peenemünde in reality is located at the north-eastern part of Germany on the North Sea.