Emilia Fox's father Edward Fox previously played the Queen's uncle King Edward VIII (the Duke of Windsor) in Edward & Mrs. Simpson (1978) whereas her cousin Laurence Fox played both her son King Charles III in Whatever Love Means (2005) and her father King George VI in W.E. (2011). Furthermore, her uncle James Fox played the Queen's paternal grandfather King George V in the latter production.
The series takes place from February 6, 1952 to April 9, 2005.