When Erik Dorf leaves his home to go to Heydrich's office on Crystal Night, he is wearing the insignia of an SS 2nd Lieutenant. When he shows up at the office, the insignia has changed to that of an SS 1st Lieutenant.
In 1935 the family is talking about Hindenburg as if he was alive at the time. In fact, Hindenburg died on August 2, 1934.
The armbands on certain inmates at Belsen read "Capo". In reality, they should read "Kapo", The leading Kapo in any German concentration camp is the Oberkapo.
On Kristallnacht, occurring in 1938, Reinhard Heydrich wears a type of collar insignia that the SS did not use until 1942.
The pre-war Ferriswheel of Vienna is shown with 15 gondolas, but until the bombardment of april 1945 it had 30 gondolas.
Hans Helms is shown in the beginning of the series to be about 19 years old and serving on active duty in the Army. He is then seen later back in high school, playing football (soccer) with Rudi Weiss.