Memory visiting was an idea I had that would enhance his retrospective. Instead of it being told in The Doctor’s words to the listening family members, he would take them on a journey to his past. Apart from anything else it WAS an opportunity to explore a little more deeply the social structure of Gallifreyan aristocracy and its snobbish attitudes and rivalry. Bellmórá Stillhaeven was a late addition to give a little more storyline to the wedding reception, and to suggest that The Doctor, in his life as a more or less conventional Gallifreyan aristocrat, before the disillusions that made him choose exile, was a bit of a ‘catch’. I also wanted to bring in the idea of Time Lords aging in different ways depending on their state of mind in order to explain the fact that he had gone from being a youngish looking man to a quite old one in the space of Susan’s fifteen years before the events of the televised episodes. Another element I wanted to show, if briefly, was Susan and David’s wedding – through the old photo album. The part of her life that The Doctor missed.