Revealing mistake: When the president talks to the reverend in the Oval Office, the picture of President Lincoln is either higher and then lower when it is shown.
Character mistake: The ‘Brit', Damien from Scotland Yard, and Emily are outside the archive facility - Damien pronounces ‘route' the American way (rowt, rather than root).
Other mistake: The First Lady mentions that her father's heart transplant was done when she was 10 years old in 2002 which means she was born in 1992, and she was 25 years old in 2017, so when did she give birth to her son Leo who's 17 years old? When she was 8?
Suggested correction: The First Lady never mentioned a date. Andrew Booker's (her father) heart transplant was done in 1987, according to the medical record found. Her father died in 2002, but that wasn't the year of the transplant.