Alan Lightman: One of the most interesting things for me-- as a writer, I've always worked in isolation. You know, I like to be in a room that's very quiet. I only get up, rarely, to eat meals. I don't even have an open window. I like serenity and quiet and isolation. So, I'm like a soloist. But working on this film, I became a member of a large orchestra, with a musician, Zoe Keating; a director, Geoff Haines-Stiles; and many other very talented and creative people, who are all working together to make this series. And that was a new experience for me: just the collaborative nature of making a film.