A one-off documentary produced for the 10th Anniversary of the tsunami that devastated South East Asia on December 26, 2004, for Smithsonian Channel and More4. The definitive story of one of the deadliest natural disasters in recorded history and its enduring legacy. The film tells the account of how and why the tsunami happened, weaving together archive footage, CGI and interviews with experts and eyewitnesses. It reveals the very latest developments in how we understand and forecast tsunamis, using historical data to model the disasters of the future.