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Experts investigate strange carvings from 8,000 BC and unexplained sightings in the New World. Is there more to the US's past than history books suggest.

Series exploring the role of trains in the major conflicts of the past 150 years. Auschwitz survivors explore the railways' part in the Nazis' mass murder.

Discover some of the combat ships that played key parts in river warfare, from Harriet Tubman's successful gunboat to the high-speed PBRs of Vietnam.

Ten British commandos, led by Major Hasler, leave the submarine Junon to paddle to Bordeaux and sabotage German warships.

Naseby: Karl and Kevin explore how weapons and armour developed, starting with the 1645 Battle of Naseby during the English Civil War.

Exploring the impact of the Battle of Hastings in 1066, Karl and Kevin continue their look at how weapons and body armour developed.

Al joins forces with German comedian Henning Wehn to delve deeper into the truth behind some World War II myths.

Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials.

Experts investigate strange carvings from 8,000 BC and unexplained sightings in the New World. Is there more to the US's past than history books suggest.

Sacred buildings around the world begin to crumble without humans to maintain them. Clues about the planet's future lie in an abandoned desert town.

Deadly toxins are unleashed upon the world without humans to contain them, turning lakes and rivers into streams of acid.

Explore the fate of crypts, safes, time capsules, personal records and other human relics. Meanwhile, Marine Corps learn to succeed in the wild.

Explore moments, motives and ramifications in war that have shaped recent history, from World War I and "the eleventh day of the eleventh month" to Operation Desert Storm.

Experts investigate the methods that Adolf Hitler and the Nazis used to indoctrinate a peaceful population, turning it into a finely-tuned war machine.

In the ancient Burnt City of Shahre Sukhteh, Iran, archaeologists uncover a remarkable discovery. The oldest known prosthetic eye, made of gold.

Professor Alice Roberts strives to get to the bottom of Elizabeth I's death, using research, medical expertise and dramatic recreation to determine possible reasons.

Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials.