The Vikings were among the fiercest warriors of all time. Yet only a select few carried the ultimate weapon of their era: the feared Ulfberht sword. Fashioned using a process that would remain unknown to the Vikings' rivals for centuries, the Ulfberht was a revolutionary high-tech tool as well as a work of art. Considered one of the greatest swords ever made, it remains a fearsome weapon more than a millennium after it last saw battle. But how did Viking sword makers design and build the Ulfberht, and what was its role in history? Now, NOVA uses cutting edge science and old-fashioned detective work to reconstruct the Ulfberht and finally unravel the "Secrets of the Viking Sword".

NOVA Season 40 Episodes...

• s40e01 - Secrets of the Viking Sword
• s40e02 - Forensics on Trial
• s40e03 - Mystery of Easter Island
• s40e04 - Ultimate Mars Challenge
• s40e05 - Inside the Megastorm
• s40e06 - Doomsday Volcanoes
• s40e07 - Decoding Neanderthals
• s40e08 - Rise of the Drones
• s40e09 - Who Killed Lindbergh's Baby?
• s40e10 - Building Pharaoh's Chariot
• s40e11 - Earth From Space
• s40e12 - Mind of a Rampage Killer
• s40e13 - Meteor Strike
• s40e14 - Ancient Computer
• s40e15 - Australia's First 4 Billion Years - Awakening
• s40e16 - Australia's First 4 Billion Years - Life Explodes
• s40e17 - Australia's First 4 Billion Years - Monsters
• s40e18 - Australia's First 4 Billion Years - Strange Creatures
• s40e19 - Manhunt - Boston Bombers
• s40e20 - Oklahoma's Deadliest Tornadoes

NOVA Show Summary

Seen in more than 100 countries, NOVA is the most watched science based television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won many major television awards, most of them many times over.