Lost Relics of the Knights Templar

Nazi loot. Roman coins. Viking artefacts. Spanish gold. These are just some of the priceless treasures that regularly pass through the hands of the world�s most prolific yet completely unknown treasure hunters, Hamilton White and Carl Cookson.

The most stunning relic in Hamilton and Carl's collection - the black obsidian chalice - is examined. The pair then head to Portugal to hunt for clues about the chalice.

This episode features the most dramatic object in the collection – the stunning Knights Templar Sword that Carl and Hamilton believe might have been used at the infamous battle of Acre – the last stand of the Knights Templar in the Holy Land.

Episode four centres on the Libation vessel. Exquisitely shaped from marble, it's Carl’s favourite piece from the hoard and in pristine condition; adorned with four carved heads.

The series finale focuses on the reliquary casket. Carl and Hamilton know the casket dates to a later period - probably early 15th century. Yet a series of engravings on it - the 'box code' - appears to make veiled references to Templar beliefs.