"That was the thing - he wasn't a person, was he?
He certainly looked like one. Although they were inside the TARDIS, an alien ship that travelled through space and time, and he was operating switches and levers that looked impossible to decipher, he looked fairly normal. Too many teeth, of course. And his knees were far too knobbly, and his hair seemed to get higher and higher every day; she had no idea what sort of weird space gel he was using on it."