John Mitchinson is from the world of books. The original Marketing Director of Waterstone's, he became Managing Director of Cassell, where he published The Beatles, Michael Palin and Brewer's Dictionary of Phrase and Fable, and now runs Unbound. He's with Einstein: 'There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.'

James Harkin is QI's Senior Researcher and Script Editor and is one of the presenters of the number one podcast No Such Thing As A Fish.