"He had sat down next to a nice lady with a bit of shopping. She’d shuffled her shopping aside so he could sit better. He had thanked her and then started talking about the weather (Londoners always talk about the weather) and the awful traffic (another popular subject) and then he started explaining where he was going. And the lady had stood up to get off, without saying a word back. Except she hadn’t got off at all, she’d just moved to another seat near the back of the bus. The Doctor had looked at her in surprise, but she wouldn’t catch his eye. Why were humans in cities so anti-eye-contact? Eyes were wonderful things, windows to the soul and all that—"