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.

A look at the most dramatic object in Hamilton and Carl's collection: the Knights Templar sword, which they believe might have been used at the Battle of Acre.

Exquisitely shaped from marble, the libation vessel is Carl's favourite piece in the hoard. Could its four carved heads be depictions of John The Baptist?

A look at what is arguably the most intriguing item in Carl and Hamilton's collection: the 15th-century reliquary casket. Season finale.