In the trial scene Bukharin denied the accusations. In fact he confessed everything.
In the first appearance of a swastika in the film, it is inverted.
HBO aggravates the "victims of communism" like it did in the case of the Chernobyl series.
Very obvious wig worn by Robert Duvall throughout the film.
The same train car (MET46) is used several times.
The quote, "loyal party manual friends" is nonsensical.
When there's a brawl at the railway station, all the train guards are standing at attention and staring straight ahead. They should be trying to restore order.
In the movie Stalin's daughter was born the day Lenin had severe stroke. Svetlana Alliluyeva was born in 1926, two years after Lenin's death.
It is unbelievable that leading bolshevik Ordzhonikidze cited the Bible and Zinoviev prays before execution.