Prof du Sautoy

and the chaotically unpredictable pendulum. A canter through McCabe (the existence of God is equivalent to an unanswered question about the universe) via Gödel, paradoxes and Penrose, to the conclusion that "mathematics is the God you're looking for; it has always been there". Although I can't be certain that's what he meant. 

And how pleasant, as he signed a copy of his book for me, to hear him speak so fondly of the wonderful Malcolm White, his headmaster at Gillott's in Henley, and the marvellous Marjorie.