Charles Brandon, Duke of Suffolk, and his wife, Katherine, are separated – later on in the series he has an affair. In reality, there is no evidence that the marriage of the Brandons was unstable, it seems to have been relatively happy.
On screen, Henry Howard, is shown as being in his mid-forties and calls Katherine Howard his niece. In reality, Henry and Katherine were cousins, and he was actually only in his mid-twenties at this time.
When Princess Elizabeth meets Katherine Howard she looks around 13/14 years old, but in reality she would only have been around 6/7.
Henry VIII speaks of the death of the French dauphin just after his marriage to Katherine in 1540, but the dauphin died in 1536.
Henry VIII is shown condemning Viscount Lisle to death, but he actually died in 1542 when being given news of his release.
A marriage between Princess Mary and the Duke of Orleans is proposed on screen, but the duke was already married in reality by this point.
There is no evidence that Anne Stanhope cheated on her husband, the Earl of Hertford, let alone with his brother. This perhaps parallels the supposed affair of Hertford’s first wife with his own father.
Henry VIII introduces Ambassador Chapuys to Jane Seymour, like it was her first time meeting him – she had been at court for some years serving both Katherine of Aragon and Anne Boleyn, so would have met the ambassador before.
Jane Boleyn, Lady Rochford, served as Jane’s principal lady-in-waiting – Jane Boleyn did serve under Jane Seymour, but the latter’s principal lady-in-waiting was actually her sister, Elizabeth Seymour.
Francis Bryan first appears in season 3 – he was actually active at court from 1528, and was instrumental in helping Cromwell to bring about the fall of Anne Boleyn, although this isn’t shown.
Francis Bryan threatening to beat Mary’s head against the wall until it was as soft as a boiled apple – these words were spoken to Mary, but it was before her mother had even died (season 2) and it wasn’t by Francis Bryan, but by either George Talbot or Thomas Howard, both staunch Boleyn supporters.
The women at the Tudor court all seems to wear crowns and tiaras – all women in the Tudor court would have worn hoods rather than these, even queens.
Charles Brandon and his ward – Charles Brandon married his ward, Katherine Brooke, but in reality she was Katherine Willoughby. On TV, Charles married Katherine in 1532, but in reality they didn’t marry until after Anne Boleyn’s coronation, in 1534.
Assassination attempt – According to the TV show, Pope Paul III organised an assassination attempt against Anne Boleyn before her coronation. In reality he wasn’t even elected until after her coronation, and there is no evidence for an assassination attempt.