As Erik Dorf is to be driven from the executions, he sees his uncle Kurt and tells him to get in the car. At that point the car has all four doors. As the car is going down the road and the men are talking, the camera angle changes and we see that the two back doors and the front right door are gone.
At an execution, several men are lined up, side by side, and shot. They all fall forward into a ditch. When we see the bodies, they are all piled together, instead of having at least a little space between some of them.
Halfway through the mini-series, Hans Helms is shown transferred into the SS from the regular German military as punishment for sleeping on watch. This would never have happened in the actual German Army, since SS personnel (especially those assigned to death squads on the eastern front) were independently raised from security police formations; a Wehrmacht soldier would never have been transferred into such a unit as a means of punishment.
Hans Frank did not attend the Wannsee Conference, as is depicted in the series. The conference representative for the Nazi government in Poland was Josef Bühler, who was Frank's subordinate.
In the last half of the mini-series, Reinhard Heydrich is shown to be wearing the shoulder insignia of an SS-General (Obergruppenfuhrer) while wearing the collar insignia of an SS-Lieutenant General.
The all black SS uniform is worn by various characters throughout the mini-series up to and including the year 1944. In reality, the black SS tunic was delegated to parade functions after 1939 and was completely phased out of the SS by 1941.
The mini-series depicts the location of the Wannsee Conference as taking place in the center of Berlin with the participants arriving at an elegant headquarters building and marching up to the second floor where the conference occurs. The conference was in fact held at a private residence at a lake side resort area outside the city with all of the conference activities taking place on the first story.
The mannerisms and dialogue of the Wannsee Conference, which portrays Heydrich dominating the conference by barking, bullying, and ordering the other participants, is completely contrary to the historic record. Historically, Heydrich conducted the conference in a somewhat civil round table format, listening to opinions of others in attendance, and addressing conflicts privately either afterwards or during meeting breaks.