Michael Portillo ventures Down Under to explore Australia by train. He begins by riding the legendary Ghan Railway, a train almost a kilometre in length and hauled by two locomotives, which covers nearly 2,000 miles across Australia's red centre. Michael traces its route from the southern harbour of Port Augusta to Darwin on the north coast, along the way meeting the indigenous people of Alice Springs, visiting a kangaroo sanctuary and joining Australians to mark the anniversary of Anzac Day, the First Word War battle that defined their nation.