Diana can be seen wrapping a Sony PlayStation for Prince Harry's upcoming birthday. This is a detail revealed in Harry's 2023 memoir 'Spare', though in the book he states it was an Xbox, which was deemed to be an error as the Xbox came out in 2001, four years after the scene is set.
The title comes from the French song 'Dis-Moi Oui', which means 'tell me yes'. It is also a play on the rumor that Dodi Fayed was planning to propose to Diana in Paris.
The shooting of the stag appears to evoke the film The Queen (2006), also written by The Crown's creator Peter Morgan, which dealt with the aftermath of Diana's death. In that film, Queen Elizabeth II admires a 14-point stag on her Scottish estate and later learns that it has been shot after wandering into the neighbouring estate.
Dodi makes a comment about contacting 'the night manager' when making plans to leave The Ritz. Elizabeth Debicki starred in The Night Manager (2016).