In the ceremonial departure from a palace in St. Petersburg on the way to Dowager Empress Marie's birthday, when Nicholas and Alexandra stop at the door from the private quarters, the court chamberlain is visible on the right side of the screen, holding only his staff of office and wearing a plain black frock coat with gold lace. A minute later, as he precedes the imperial couple down the red carpet through the public spaces of the palace, what appears to be a hat is in his left hand, and he wears what appears to be the sash of the Order of St. Stanislaus.
When the family is in the basement in the final scene, the Grand Duchesses' hairstyles are based on official photographs from 1914. In real life, when the Grand Duchesses were imprisoned, their heads were shaved due to illness. By the time they were killed in July 1918, their hair had grown to the napes of their necks.
In the movie, Dr. Botkin is the only servant executed with the royal family. In reality, the maid, footman, and cook were also killed.
In the movie, the family spends the winter of 1917/18 in a log cabin. In real life, they were exiled to a Governor's Mansion when they were in the custody of Kerensky's Provisional Government, before the Bolsheviks took over.
At the 1904 Fifth Party Congress in London, James Hazeldine's character meets Lenin, and introduces himself as Stalin. The two had met before in real life, and Stalin started using that name in 1912.
The abdication scenes never mention Nicholas' brother, Michael, who was next in line for the throne after Alexis. In reality, Nicholas drew up a new manifesto naming his brother Grand Duke Michael the next Tsar. Though he was proclaimed as the new Tsar to soldiers on the Eastern Front, Michael deferred taking power until the people of Russia were allowed to vote on retaining the monarchy.
In the final scene, just before she is shot, Alexandra crosses herself from left to right, the Western way, rather than from right to left, the Russian Orthodox way, as she did in previous scenes. But since she was raised as a Lutheran, she may instinctively crossed herself the way she first learned as a child.
In the movie, no one speaks during the execution scene. According to Bolshevik accounts, Yurosky announced "The revolution has died, and you must die with it" just before they were shot. Since the fall of the Soviet Union made uncensored research materials available, many historians now believe the Bolsheviks made up Yurosky's statement, and he said nothing to the royal family before they were shot.
Gavrilo Princip has a beard in Alexis' nightmare. In real life, Princip had a mustache. A dream sequence doesn't necessarily conform to reality. Alexis likely had no idea what Princip looked like.
Nicholas is still called 'Tsar' after his abdication. However, he wasn't succeeded, he would still be considered the Tsar (as it has been a common shared opinion about monarchs).
St. Petersburg was the capital of the Russian Empire until 1918. Russia's capital wasn't Moscow in the times of the film's setting.
Either signs or writings are written in either Russian/Cyrillic letters or English/Latin letters. This is a big inconsistency in the film's language depiction.
The last scene involves at least 1 minute of waiting. The clock in the room ticks, but the minute hand never moves.
Photos (or drawings) of both Janet Suzman as Czarina Alexandra and the real one are seen hanging on walls in the film. Suzman bears little physical resemblance to the real Alexandra, it makes quite an inconsistency to the appearance depiction.
As Grand Duke Nicholas Nikolaevich discusses the family party to celebrate the birth of the Tsarevich Alexis, he looks out a window at his daughters playing in the snow with Monsieur Gilliard, their French tutor. Alexis was born in August, so no snow would have been on the ground, even in northern Russia.
Peter Arkadiavitch Stolypin, Prime Minister of Russia from 1906-1911, mentions the Tercentenary in his meeting with Nicholas in Livadia. He also attends the Tercentenary celebrations. In real life, Stolypin was assassinated in 1911 and the Tercentenary was in 1913.
In a scene set during WWI, one of Nicholas' advisers arrives at a train station in a 1930 Ford Model A.
At the start of the movie the Tsarevich Alexis is born. That was August 12, 1904. The next scene is Tsar Nicholas with his uncle and his prime minister, Count Witte, discussing the Russo-Japanese war. They spoke about the possibility of "Port Arthur falling" (into the hands of the Japanese). The Russians already lost Port Arthur by February of 1904, six months earlier.
In the movie, the Romanov Tercentenary celebrations, in 1913, take place before Alexei's near-fatal accident in October 1912.
Because Jack Hawkins (Count Fredericks) is being dubbed, his voice isn't exactly matching his mouth movements.
The musicians in the orchestra at the ball are clearly pretending to play.
While in exile, one letter is from dowager empress Marie Feodorovna, stating that she will go to England (away from the Bolsheviks). She knows the family is in Bolshevik occupation, why would she state where she's heading? any Bolshevik would've found out, if they read the letter.
When Yakovlev helps the royal family escape, he tells Nicholas, in the back of the train, "You only know how many soldiers died because someone counted them for you. Seven Million!" Fewer than two million Russian soldiers were killed during WWI.
Rasputin continuously mispronounces Matushka (little mother). The correct pronunciation is "MA-toosh-ka."
In the film's closing credits, the character played by Irene Worth is referred to as the "Queen Mother Marie Fedorovna", but that is more the British equivalent. In Imperial Russia, her correct title, after the death of her husband, Czar Alexander III, was the dowager empress or czarina.
At the beginning, when speaking about the Russo-Japanese War, Nicholas says that Russia has never lost a war. However, it lost the Crimean War.
Alexis does not appear to age at all from the scenes that are (presumably) set in 1911 (or 1912) to 1918. He would've been aged 7 (or 8) to 14.