Character mistake: The quote on the wall in Bethlem: Mens sana in corpora sano. 'Corpora' would be feminine, whereas 'sano' is masculine. So it should be Mens sana in corporE sano.
Taboo (2017)
1 character mistake - chronological order
Starring: Tom Hardy, Jonathan Pryce, David Hayman, Oona Chaplin
Genres: Drama
Factual error: The Prince Regent's servants address him several times as 'Your Majesty'. Since his father, the King, is still alive he is actually 'Your Royal Highness'. No royal servant would make this mistake.