King Harald Bluetooth consolidates his own authority among the Danes by choosing to be baptised and convert his people, but power in over-ambitious hands can unfortunately lead to the worst.

Actor Jason Watkins and historian Tracy Borman investigate the final mystery of Stonehenge: the altar stone. Discovering its source could be the key to understanding why Stonehenge was built.

We follow scientists on a 30-year quest to uncover who created the Chauvet cave paintings; we learn how it survived millennia and how to protect this archaeological wonder for future generations.

For years it was claimed that Adolf Hitler was a man without a private life, a socially disturbed character; on his farm in the Berchtesgaden Alps, he was surrounded by a close-knit family circle.

Djoser, a pharaoh of the third dynasty, is famous for the construction of the first step pyramid; his reign was marked by monumental achievements and the resolution of a famine.

For years it was claimed that Adolf Hitler was a man without a private life, a socially disturbed character; on his farm in the Berchtesgaden Alps, he was surrounded by a close-knit family circle.

After Hatshepsut's death, Thutmose III proved himself at Megiddo against Canaanite kings; from Deir el-Bahari to Karnak to the fortress, discover the battle that made him Egypt's most warlike pharaoh.

Japanese troops occupy southern Vietnam and Cambodia, but the day that changes the war comes on December 7th when Japanese aircraft attack the American Pacific Fleet at anchor in Pearl Harbor.

When we think of Skoda, we think of cheap and efficient family cars; back in the 1930s, its factory was the cover for espionage, sabotage, and the liberation of Jews from all over Europe.

Deep sea divers hunt for the wrecks of Hitler's dreaded U-Boat fleet off Ireland's Northwest coast while historians unravel the early stages of WWII's longest campaign.

After driving his father off the throne of Denmark, Sven Forkbeard resumes the traditional Viking activities that his father had abandoned for a time: bloody raids on England.

Sven dies suddenly less than five weeks after claiming the English throne; his son Cnut the Great believes he can succeed his father as king, but the English people decide otherwise.

Romuald's Cave in Istria has 30,000-year-old paintings, discovered by Darko Komšo, that complement Slovenia's 60,000-year-old flute and Croatia's 33,000-year-old Neanderthal remains.

177 B.C. / B.C.E - when Romans cut their water supply, the Histri led by King Epulon chose to kill their families and themselves; the Histri had inhabited the Adriatic since 1500 B.C. / B.C.E.

Japan's escalation of the War in the East is devastatingly effective; despite their success, it is possible to see their inevitable defeat as they have roused the military might of the USA.

Ferdinand Porsche was one of the most influential engineers in Nazi Germany; by inventing the most powerful war machines, he created the blueprint for the muscle cars that would make his name.

Bulgaria is a treasure trove of history and culture; join Bettany as she embarks on an adventure meeting local people, sampling their cuisine, and learning about their cherished customs along the way.

Ramses II reigned for 66 years and left a colossal legacy of monuments and temples; his reputation embodies the power and grandeur of Pharaonic Egypt.

Throughout WWII, Jews were deported to extermination camps such as Buchenwald; Commander Koch leads a middle-class life nearby with his family as his children play next door to the horror of the camp.

1274 B.C. / B.C.E.: The Egyptian pharaoh Ramses II and Hittite King Muwatalli II clash in one of the greatest battles of antiquity at Qadesh in a story of spies, surprises and reversals of fortune.

Divers hunt for the wrecks of WWII's longest campaign that lie off Ireland's Northwest coast as historians explore the Allied fight back at sea and the human cost of war.

After driving his father off the throne of Denmark, Sven Forkbeard resumes the traditional Viking activities that his father had abandoned for a time: bloody raids on England.