Secret History

Engineers digging for Crossrail have made a chilling discovery: dozens of skulls under London's Liverpool Street station. It's clear the skulls are from Roman London, but nothing like this has been found before. This documentary unravels the mystery, using ground-breaking archaeological investigation. Who are these people and how did their skulls get there? There are many theories: they could be victims of a massacre, or gladiators; they could have naturally washed out of cemeteries in times of peace or be executed rebels; they could even be the victims of some grisly, long-lost ritual. Now the tools are available to solve the mystery. The investigation covers Boudicca's rebellion, the bloody gladiatorial arena, and head-hunting sites in France. Does the investigation answer the mystery of the Crossrail skulls?

A look at the relics found in the tombs of China's Han Dynasty - an era that is generally considered the golden age of ancient China. It's up there with the Roman Empire in terms of international power at the time and has been a defining influence on the country's cultural identity ever since, with China's majority ethnic group referring to itself as the "Han people" and the Chinese scripts referred to as "Han characters". This programme examines how the emperors arranged to have their dead bodies mummified in the search for immortality and looks at a newly discovered version of the famous terracotta army - sculptures depicting the armies of Qin Shi Huang, the first Emperor of China.

Documentary following the discovery of fossilised remains in a deep and nearly inaccessible cave in South Africa. The bone fragments recovered were found to have come from a previously unknown species of human ancestor.

Secret History has exclusive access behind the scenes of the momentous expedition that found HMS Erebus: the Royal Navy ship that disappeared in 1845 while searching for the Northwest Passage

Engineers from the Crossrail construction project have uncovered a 300-year-old graveyard that reveals intriguing new information about the people who built London.

Former Royal Marines commando Arthur Williams embarks on a journey to explore the experiences of nearly two million British soldiers who suffered life-changing injuries and disabilities during the First World War.

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Absolutely gripping story of the Lancaster pilots who launched an attack on the Tirpitz. These men on both sides are so heroic and dignified . We are so privileged to hear the story first hand from these men. Very moving .

The Hanging Garden of Babylon is the only one of the seven wonders of the ancient world for which no archaeological evidence has ever been found. Centuries of digging have turned up nothing, and many people assume it never existed. But has everyone simply been looking in the wrong place?

Nearly a century after Howard Carter's discovery of Tutankhamun, Egyptologist Dr. Chris Naunton returns to Carter's vast excavation files; the notes suggest that the Boy King's mummy was burned.

A documentary made on the alleged crash of an alien spacecraft in Roswell, New Mexico in 1947, after the now infamous footage of an autopsy of an alien was published.