World War II was a battle for supremacy at sea more than any other conflict before or since; in this episode, we explore how the secret weapons of naval warfare changed the tides of history.

December 1944: Hitler has picked the Ardennes sector for a major offensive. The surprise attack, spearheaded by elite divisions, initially sends American units reeling.

The Allies plan how to break through Hitler's Atlantic Wall for years. The D-Day fleet is the biggest assembled in history, responsible for one of the bloodiest and most extraordinary battles of WW2.

Bettany explores the Sultanate of Oman, a land full of surprises and contrasts that is wedged between the vast sands of the Arabian Desert and the glistening waves of the Indian Ocean.

Following the success of Hernán Cortés over the Aztecs, conquistador Francisco Pizarro sets his sights on conquering the Incas, the largest civilisation in the Americas.

In 1918, when Europe was still deeply involved in the Great War, a particularly virulent flu swept across the five continents. The disease was mistakenly called the Spanish Flu. The plague lasts for 18 months and kills between 50 and 100 million before it is forgotten. With humanity once again in the throes of a health crisis, what lessons can we learn from this much lesser-known tragedy, which was actually the mother of all pandemics?

Thousands of people were dosed with LSD by the CIA; did the CIA murder its own people, poison a whole French town, experiment on New Yorkers and assassinate Bobby Kennedy?

The House of Romanov had imposed 300 years of strict Imperial rule, but royal authority was in question for the first time. The future of the Romanov dynasty was in danger.

Air supremacy has been key to winning a war since the dawn of aerial warfare; from the Sopwith Camel biplane to the F22 Raptor, we identify and rank the most influential aircrafts in history.

Zahi and his team unearth sarcophagi dating from the New Kingdom and the Late Period of ancient Egypt that will need to be scanned and maybe even opened, but there are more surprises in store...

The pockmarked mummy of Pharaoh Ramesses V looks serene, but there's evidence of deliberately inflicted wounds that suggest a sudden violent death... if this was the case, then who was the killer?

February 2021: a nearly intact Roman ceremonial chariot is unearthed to the north of the site of Pompeii. How could it have been used, and what would traffic have looked like in Pompeii's streets?

The life and death of Cleopatra is shrouded in mystery; the discovery of this legendary queen's last resting place could shed new light on her personal and political trajectory.