An ancient mechanical device found on a 2,000-year-old shipwreck has become known as the world's first computer. The machine is centuries more advanced than historians thought possible, but its origin and true purpose are shrouded in secrecy. Can modern technology finally unveil what the mysterious Antikythera Mechanism actually is?

During World War Two, the Nazis stole vast amounts of art, gold, silver and currency, and stashed it across Europe. While some of the plunder has been recovered, much more is still missing nearly 80 years later. Where did the Nazis take their stolen loot? And can it ever be found?