The series is based on the appendices of JRR Tolkien’s ‘Lord of the Rings’ books and is the most expensive TV series of all time. Earlier this month, HBO said “House of the Dragon,” a prequel series to “Game of Thrones,” was the biggest series premiere in its history. Clarification: This story has been updated to reflect that “The Rings of Power” is based on “The Lord of the Rings” appendices.
