The song that plays at the end credits, Can't Take My Eyes Off You, is a cover version sung by the cast of The Crown.
The title of this episode, "Terra Nullius," refers to land that is deemed legally uninhabited or unoccupied. This is how Britain viewed Australia when they laid claim to it in the 18th century.
Emma Corrin has 17 costume changes throughout this episode, many of which are recreations of the over 200 changes of clothes that Princess Diana brought on the real 1983 Royal Tour of Australia.
This episode was Josh O'Connor's winning submission for the 2021 Emmy for Outstanding Actor in a Leading Role in a Drama Series.
A week after Prince Charles had proposed, in early February 1981, Lady Diana Spencer made a short trip to Australia with her mother and stepfather to visit their sheep station at Yass, north of Canberra. The Prince of Wales also visited Australia in the same year, shortly after the announcement of his engagement and prior to his July wedding.