The day after Christmas, 2004, an earthquake off the coast of Sumatra triggered a natural disaster in which nearly 200,000 people throughout Southeast Asia lost lives and several million their homes. But in the midst of this catastrophe, on a small archipelago in the Andaman Sea, a tribe of several hundred villagers escaped almost certain extinction by a simple precaution: they listened to the prophetic dreams of their elders. With ex-pat John Gray, we searched for the secrets of the sea gypsies on Expedition Thailand: Survivors of the Tsunami.