Brian Cox claimed that the sequence in which the courtroom is shown a film of Nazi concentration camps required numerous takes. With the actual film being projected, genuine walkouts occurred on-set from crew members who couldn't take watching it anymore.
During the Christmas party, the Russian judge, Gen. Iona T. Nikitchenko states that 20 million Russians died during the war. Three months later in March 1946, during an official interview with the Russian newspaper "Pravda", Joseph Stalin stated that the official death count was only seven million. The 20-million death toll wasn't admitted to until 1956: Premier Nikita Khrushchev gave that total to a Communist Party congress meeting in Moscow. In 1989 during the Mikhail Gorbachev "Glasnost" era, the total deaths were then reported to be 27 million. With the fall of the Soviet Union in 1991, the state archives were opened to research by private historians: the death toll was stated to be as high as 35 to 42 million but not recognized by the state. The research by private academics has caused the state to again shut down the archives.
Sam Stone, who plays Julius Streicher, is a Jew whose father survived the Holocaust. It was only with the greatest difficulty that he maintained an impassive face during the scene where films of Nazi concentration camps are shown in the courtroom. Upon completion of the scene, he immediately burst into tears.
Capt. Gustave M. Gilbert (Matt Craven), the prison psychologist, wrote a book about his experiences during the trial titled 'Nuremburg Diary"' He later emigrated to Israel. Craven would later play another military psychologist in The Pacific (2010).
Most of the actors playing the defendants are Canadian, the country where the miniseries was filmed. Herbert Knaup, who plays Albert Speer, is one of the few actual Germans in the cast.