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.
Brian Cox claimed that the sequence in which the courtroom is shown a film of Nazi concentration camps was filmed take after take with the actual film being projected, and that there was genuine walkouts on-set from crew members who couldn't take watching it anymore.
Brian Cox went on to play Dr. Joseph Bell, the real-life inspiration for Sherlock Holmes. Christopher Plummer had already played Holmes himself. The two men both have a relative who has played Holmes's assistant, Dr. Watson. Plummer's cousin, Nigel Bruce, played the part in the early Holmes films. Cox's son, Alan Cox, played Watson in Young Sherlock Holmes.
During the Christmas party the Russian judge General 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 Generalisimo Stalin stated that the official death count was only seven million. The 20 million death toll wasn't admitted to until 1956 when Premier Nikita Khrushchev gave that total to a Party congress meeting in Moscow and then to 27 million in 1989 during the Gorbachev glasnost era. With the fall of the Soviet Union in 1991 the state archives were opened to research by private historians. The death toll has since been stated to as high as 35 to 42 million but is not recognized by the state. The research by private acedemics has again caused the state to shut down the archives.
According to Brian Cox the producers wanted the miniseries to be the first of an anthology of WWII sagas, and they were interested in him returning to star as Winston Churchill. Though the project was never made, Cox would go on to play Winston Churchill in Churchill (2017)