Two treasure hunters investigate a sword and helmet that date back more than 900 years; they work to decode the symbolism on the ancient relics and discover the sword was used in the First Crusade when Christian knights took control of Jerusalem.

Treasure hunters investigate an extraordinary collection of Celtic gold from the Iberian Peninsula that dates back thousands of years, including a rare gold bowl and a stone altar to the god Endovelicus that may have been used in ritual sacrifices.

Two treasure hunters head to France to continue investigating a rare white marble chalice used by the Knights Templar; they also explore the cult of the black Madonna and dig into the theories made popular by the novel and movie "The Da Vinci Code."

Two treasure hunters have a wooden chest full of relics from the medieval Christian pilgrimages, including pendants from the Camino De Santiago in Spain.

Nazi loot, Roman coins, Viking artifacts and Spanish gold are just some of the treasures that regularly pass through the hands of Hamilton White and Carl Cookson as they trace the origin of relics believed to have belonged to the Knight's Templar.