Diving into Lake Superior, Josh has brand-new intel that may finally solve a 100-year-old mystery: the resting place of two WW1 minesweepers; on their way to combat German mines in the Atlantic, the warships sank and took the lives of 79 sailors.

Pushing into remote jungles, Josh investigates one of the 20th century's biggest heists - looting of Cambodian statues worth hundreds of millions; Josh rappels into a crumbling pyramid and digs up a treasure trove of missing monuments.