Juliana says Washington D.C. was nuked on a Sunday, knowing so many would be in church. However in the previous season the bomb was shown going off at night when most people were home.
The $5 United States Note that Julia brings to the GNR is dated 1964. In the "real" world the final printing of these bills carried a 1963 series date. However this discrepancy could be explained by Julia having obtained it in a Nebenwelt that was just slightly different from the "real" timeline.
Obergruppenführer Goertzmann says he grew up in the mountains of Bavaria, but has a distinct Berlin accent (Marc Rissmann was born in Berlin).