Here’s part 2 of the Robert Holmes interview. He talks about the Time Lords, about his interest in the fictitious version of Victorian London, and about his returns to the series in the 1980’s, which included ‘The Caves of Androzani’, ‘The Two Doctors’, and nearly ‘The Five Doctors':
“People ask whether I based the Time Lords on religious grounds, rather like the Vatican, but I saw it more as scholastic. I mean you have your colleges of learning with Deans and all that. I decided that from what we knew of the Time Lords, they were august and remote people who were only concerned with keeping the structure of time in place. But then I looked back and discovered that they ‘framed’ the Troughton Doctor and got him to do various things for them, and then hauled him up in front of them on trial – like the Americans persecuting McCarthy – so I decided there were two sides to them. They have one image that they project but they were something else to themselves, which every now and then produced renegages like the Meddling Monk, Omega and the Master.