Continuity mistake: After the actress throws the script on the bed, the script keeps changing position in every shot.
Factual error: In the final scene Lady Diana is being pursued by photographers during the time of her courtship with Prince Charles. The most prominent car in the scene has an 'X' registration plate. The registration letter 'X' was only used from August 1981 onwards - after the wedding of Charles and Diana.
Continuity mistake: Opening scene is a 1947 flashback with Claire Foy giving her 21st birthday speech. When the camera is near, the black microphone is near her face with no sign, but in a long distant shot, there is a black BBC sign on top of it. (00:04:11)
The Hereditary Principle - S4-E7
Continuity mistake: When Margaret and Charles start eating, her fork is pointing downwards in the angle shot from behind, but upwards in the front shots.
Factual error: Sir Martin Charteris, depicted as being Private Secretary throughout the series (which begins in 1979), actually retired in 1977. Sir Philip Moore and Sir William Heseltine were the real Private Secretaries during this period.
Factual error: Michael Shea was not forced to resign ignominiously as Press Secretary in 1986. He actually left in 1987 and was appointed Companion of the Royal Victorian Order for his service.
Factual error: The Guards band playing at the garden party (in 1982) includes female musicians in the same uniform as the men. Until integration in 1992, the only female musicians in the British Army were members of the Band of the Women's Royal Army Corps. Women did not join Guards bands and wear their uniform until well into the 1990s.
Factual error: When the lunar module lands on the moon, you can see light coming through the windows and everyone is fully dressed. In reality, Neil Armstrong stepped onto the moon at 2:53 AM London time. It would have been completely dark and everyone would have likely been in night clothes or evening attire.
Factual error: Prince Phillip is boarding the yacht, and seen in the background is a red modern vessel that would not have been around in that era. The vessel shows very modern signs of shipbuilding in its new shape, and modern rescue craft. With satellite domes located on the bridge.
Factual error: Diana's actual coif in her late 20s was much fuller at the top and the sides, and slightly longer in the back than this depiction.
