In the last episode of Season 3 we briefly trace the history of Australia's first and most important export, coal, and the city with which it is inextricably linked. We trace this history from the dreaming of the Awabakal people all the way to the open cut coal mines of the Upper Hunter that frame our national narrative to this day.One particular mystery, however, forms the focus of the episode; just why did roughly 50 merchant ships laden with Newcastle coal go missing in the Pacific Ocean bound for the West Coast of the Americas? And why were the powers that be so stubborn in their refusal to address an issue that cost over 1000 lives in the late 19th Century?