Chris hurried after him. 'It's so hard to believe we just travelled hundreds of light years.'
'Why?' asked the Doctor.
'I always understood that you cannot travel faster than light,' said Chris.
'Says who?'
'Says Einstein,' said Chris.
'What?' The Doctor stopped and put an arm around Chris's shoulder. 'Do you understand Einstein?'
Chris wasn't sure where this was going. 'Yes.'
'What?' gasped the Doctor. 'And quantum theory?'
'Yes,' said Chris. He basked in the Doctor's astonishment, on firmer ground at last.
'What?' gasped the Doctor. 'And Planck?'
'Yes,' said Chris.
'What?' gasped the Doctor. 'And Newton?'
'Yes!' said Chris.
'What?' gasped the Doctor. 'And Schoenberg?'
Chris paused. Was it a trick question? He recalled reading about the crisis of tonality. He thought he'd caught most of it, so he answered proudly, 'Yes. Of course.'
The Doctor whistled, apparently impressed. Then he said, 'You've got an awful lot to unlearn, Bristol.'