An adventure recommended for 2 to 6 players. Pregenerated player characters available include the Firth Doctor and his companions Adric, Nyssa, Tegan Jovanka and Vislor Turlough. From the back of the adventure book: "DINOSAURS IN THE TWENTY-FIRST CENTURY? That was only the first mystery that confronted the Time Lord and his Companions when they set out to investigate a violent revolution in an age of turmoil, and stumbled into a plot that could end human history - and change the universe forever. A lost city and a vanished race from the depths of time and hold the key to the destiny of the Earth, unless the adventurers can penetrate the mysteries of The City Of Gold."