“The title of season four, episode six of The Crown is “Terra Nullius,” a Latin phrase that means “nobody’s land.”

“Creator Peter Morgan no doubt picked it due to the presiding plotline: Charles and Diana’s 1983 royal tour of Australia, which coincides with the country’s growing movement to leave the British Commonwealth.

“Nearly 200 years earlier, Great Britain used the concept of “terra nullius” to justify colonizing Australia, claiming the land was unclaimed and unpopulated, despite its residing Aboriginal population.

“But it also serves as a double entendre: Diana and Charles also find themselves in uncharted territory, a no man’s land.

“This is their first overseas tour together—and with the monarchy in a perilous position, a successful impression is paramount. Can they put aside their early marital problems, their clashing personalities, for the Crown?”

Read more at Vogue