Season 16

Documentary focuses on investigating mysteries of burial grounds of William Shakespeare led by noted historian Dr. Helen Castor.

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?

Thousands of British sailors died in the Battle of Jutland. It has been plagued by controversy ever since. This Secret History film joins a landmark expedition to uncover the truth about the battle.

No overview available for this episode.

For 1300 years, Wu Zetian - China's only female Emperor - has been remembered as a callous tyrant who brought calamity to China. But new discoveries paint a very different picture of her reign.

No overview available for this episode.

No overview available for this episode.

No overview available for this episode.

A century on from the last offensive in the Battle of the Somme, this documentary tells the rarely-told story of the men who helped spur Britain towards victory, in a key World War I turning point First shown: 13 Nov 2016

Academic experts and military veterans give their opinions on whether the attack was a cock-up or conspiracy