In episode seven, Charles and Diana, who are bitterly separated, reunite to drop off William for his first day at Eton College. Harry accompanies the family, too. In the show, Charles gets mad at Diana for "smothering" William, while Diana is apprehensive about leaving him. William was 13 when he started at the storied boarding school. The school is very close to Windsor Castle, and as the show depicts, William would often walk over to visit his grandmother, the queen.