In the season’s sixth episode, while in Australia, Princess Diana references the fact that Prince Charles wore cufflinks gifted to him by Parker Bowles on their honeymoon.
In The Crown, Prince Charles is depicted as hating Gordonstoun School, the institution his own father Prince Philip attended and sent him to.
According to Sally Bedell Smith’s biography, Prince Charles: The Passions and Paradoxes of an Improbable Life, Prince Charles continued to phone and talk to Parker Bowles constantly after she got married.
The series shows Princess Diana approaching Prince Charles in his car years later to “offer [her] condolences” following the death of Lord Mountbatten.