Episode #2.1 - S2-E1
Factual error: Season 2 covers 1921 to 1922. The car (YP8086) used in this episode was first registered 9th August 1926. (00:38:20 - 00:39:30)
Episode #2.1 - S2-E1
Factual error: Tommy refers to London at the south end of the Grand Union canal. However, the Grand Union in 1921/22 was what is now the Leicester branch. The Grand Union as it is known now was an amalgamation of 7 canals in 1929.
Episode #2.2 - S2-E2
Continuity mistake: When Polly holds the gun against Tommy the hammer is pulled. Next shot it isn't. (00:45:52)
Episode #2.2 - S2-E2
Factual error: Tommy's service record quoted by Churchill says that he served throughout the war with the Warwickshire Yeomanry. But we already know that he was a tunneller on the Western Front. The Warwickshire Yeomanry was a cavalry regiment (which actually served in Egypt, Gallipoli and Palestine and finally as a machine-gun battalion on the Western Front at the very end of the war). All tunnellers served with the Royal Engineers.
Episode #2.2 - S2-E2
Factual error: Tommy tells Churchill that he served at Verdun and several of Churchill's assistants say that they did too. There were no British troops at Verdun. It was a battle between the French and the Germans.
Episode #2.3 - S2-E3
Other mistake: When the mother of a boy Arthur beats to death while boxing comes for revenge, she fires a single shot from a six-shot revolver at Arthur's head. Arthur then takes the revolver from her, ejecting 6 unspent bullets instead of 5. (00:28:24)
Episode #2.3 - S2-E3
Continuity mistake: The bullets on the table change positions during the scene after they stopped moving. For example, when Arthur moves the glass, you see 5 between him and the glass. In the next shot, you can't see any of the bullets, even though you see the same area. They're back when she flips the table.
Episode #2.5 - S2-E5
Continuity mistake: The camera cuts between a wide shot and a close-up of Pol and Inspector Chester Campbell undressing her. Between scenes for the next minute, Pol's shirt is on in the close-ups but taken off in the wide shots. (00:24:40)
Episode #2.5 - S2-E5
Factual error: The Metropolitan Police officers who arrest Arthur in Camden Town are wearing the spiked helmets of the Birmingham City Police, not the boss-topped helmets of the Metropolitan Police, which we do see at other times.
Episode #2.6 - S2-E6
Factual error: The field marshal is wearing a revolver to the Derby. British soldiers are only ever armed on duty, certainly not when attending social events. He also wears his Sam Browne outside his shoulder strap instead of beneath it; no officer would do this.
Episode #2.6 - S2-E6
Factual error: Tommy's warrant is signed by the 'Minister of the Empire'. There was no such post. The Colonial Secretary dealt with the British Empire.
Factual error: The Russian grand duke is called Leon Petrovna. Petrovna (daughter of Petr) is a patronymic used by a woman. A man would use Petrovich (son of Petr).
Episode #3.1 - S3-E1
Continuity mistake: At the wedding, Arthur leaves the table looking for Tommy and Grace, leaving his suit jacket. The next scene, he appears at Tommy's door wearing the jacket. (00:14:20 - 00:15:30)
Episode #3.1 - S3-E1
Visible crew/equipment: While Tommy is making a toast at the dining table, a boom mic can be seen at the top of the frame for a brief second. (00:19:30)
Episode #3.1 - S3-E1
Continuity mistake: When Michael and Charlotte are alone together, the size of the flame on the candle differs depending on who is in shot.
Episode #3.2 - S3-E2
Factual error: Patrick Jarvis mentions Tbilisi. Nobody in Britain would have called the city by that name in 1924; it was still always referred to as Tiflis.
Episode #3.2 - S3-E2
Factual error: Father Hughes says that Admiral Hall may be detained in the House of Lords. Admiral Hall, although knighted, was never ennobled and thus did not sit in the House of Lords.
Episode #3.2 - S3-E2
Continuity mistake: John and Polly are talking in his office. He is wearing a ring on his left hand, then a few seconds later he is not.
Episode #3.3 - S3-E3
Factual error: Grace suffers a gunshot wound to the upper left chest in the previous episode, and episode three reveals she died. The bullet would have passed under the clavicle and would have missed the axillary artery and all other major blood vessels. This wound should not have been lethal, especially because Grace's family immediately called for an ambulance, so she would not have had to wait long for medical treatment. Most of her family members are military veterans who would have knowledge to provide the necessary first aid. (00:01:50)
Episode #3.3 - S3-E3
Factual error: Tommy refers to Istanbul. It was always still called Constantinople in the West at that time and would be for several more years.
