S1, E2: A team of field investigators uncovers the clues that will recreate vanished or hidden worlds. They use the latest research, expert analysis and cutting edge graphic technology to take us back. In the heart of the Mediterranean a peaceful island explodes with devastating force - it will be the biggest volcanic eruption in three and a half thousand years of recorded history. At a stroke, an entire civilization is wiped from the face of the earth and lost. All that remains are stories. Then, at the dawn of the twentieth century, the remains of a spectacular palace are discovered on the island of Crete, preserved beneath thousands of tons of volcanic ash. And out of the physical clues lifted from the ash, a radical theory emerges. These ruins could be the home of an ancient civilization: Atlantis. As they uncover a lost world, our investigators find that a palace on Crete and a town on Santorini are linked by the unique engineering of their buildings. Rebuilding incredible towns, temples, and the palace of Atlantis as described by Plato and uncovered by 21st century archaeologists, we reveal the majesty and the mystery of this lost world. The builders of this palace achieved a level of engineering excellence that would not be seen anywhere else in the world for centuries. With its massive scale, its complex water management systems, and its sparkling gypsum walls, the engineering of this extraordinary palace connects it to Plato's descriptions of Atlantis.