"1480: Leonardo da Vinci visits the stars. 1508: Vasco da Gama sets foot on Mars. 1585: Francis Drake begins charting the Asteroid Belt. 1588: Earth is destroyed by a storm of angels." "The Doctor was really enjoying his freedom. But now there's a Temporal Agent on his tail. Gloriana and the President of Gallifrey are not amused. And Susan's none too well either. Possibilities, like the Doctor, have a habit of running away with themselves. But who cares, when the jewels are so dazzling."