The return of the programme that features behind-the-scenes tales of royal residences, beginning with stories of love and marriage from within palaces' walls. There is a look at the scandal caused by Princess Diana's intimate phone conversations with James Gilbey after recordings of them were sold to the Sun newspaper, while the programme also shines a light on the joyous time Elizabeth II spent with Prince Phillip at their palace of Villa Guardamangia on Malta, shortly after their marriage. Plus, Kate Williams reveals the extraordinary story of Prince Albert's erotic gift to his wife Queen Victoria