The Crown traces the life of Queen Elizabeth II from her wedding in 1947 through to the early 2000s.

Season three covers the time period between 1964 and 1977, beginning with Harold Wilson's election as prime minister and ending with the Silver Jubilee of Elizabeth II. Events depicted include the unmasking of the Queen's art adviser Sir Anthony Blunt as a Soviet spy, Harold Wilson and Edward Heath's respective times as prime minister, the Aberfan disaster, the Apollo 11 moon landing, the 1969 Investiture of Prince Charles, the death of the Duke of Windsor, the death and state funeral of Winston Churchill, and Princess Margaret's eight-year affair with baronet and gardening expert Roddy Llewellyn and suicide attempt that leads to the Princess's divorce from Antony Armstrong-Jones in 1978.