I knew that the Doctor would never really let me come to real harm. Although as we approached the very depths of Rotten Cobs, I couldn't help remembering all the terrible times when he had let really awful things happen to me. In Chroma, for instance. And Paris. And that moon with all the robots, and all kinds of places. It wasn't quite true that he was there to whisk me out of peril. Sometimes Mrs. Wibbsey has to come to her own rescue.