Factual error: Major Hoffman asks the brainwashed Doug what unit he is with. Doug answers, "74th Panzer Division." Neither the German Army nor the SS had a 74th Panzer Division.
Factual error: The Gestapo major's office has a picture of Rudolf Hess hanging on the wall. Not likely, as Hess parachuted into Scotland in 1941 and was considered a traitor to the Third Reich.
Factual error: Right at the start of the episode there is a sign visible on the side of a building that shows the German word "Warenhaus." This is a wrong translation of the English word "warehouse." The correct German word should be "Lagerhaus."