The episode won an Emmy Award for Outstanding Cinematography for a Single-Camera Series (One Hour).
William Euan "Billy" Wallace (Tom Durant Pritchard), sole heir to a £2.8 million (£74 million today) fortune and an old friend, was reportedly Princess Margaret's favorite date during the mid-1950s. Margaret accepted one of Wallace's many proposals to marry, but the engagement ended before announcement when he admitted to a romance in the Bahamas. In 1965, she was a guest at his wedding to Elizabeth Hoyer Millar.
When the first eyeglasses were constructed in 13th century Italy, the lenses were made of beryl (or of rock crystal) as glass could not be made clear enough. Consequently, glasses were named Brillen in German and Dutch.
The piano player at the party is supposedly Dudley Moore, soon to be a famous star in England with partner Peter Cook, and then a Hollywood star after that. Playing piano, which is also did in his movies (including Arthur (1981) ), was his favorite pastime, more than comedy or acting.
Tiaras: Elizabeth wears Queen Alexandra's Kokoshnik Tiara which is similar but not exactly the same as Queen Mary's Fringe Tiara that Elizabeth wore on her wedding day. Margaret is seen wearing the Cartier Halo Tiara, the same tiara worn by Catherine, Princess of Wales on her wedding day in 2011. Elizabeth, the Queen Mother, is seen wearing the Greville Tiara often worn by Queen Camilla.