In this episode, Neil Oliver arrives on Horn Island to uncover the role of Australia’s only indigenous battalion, a World War II fighting force of Torres Strait Islanders. On Possession Island, Tim Flannery stands where James Cook finally claimed Australia for Great Britain. Xanthe Mallett ventures into the treacherous Adolphus Channel, the scene of Queensland’s worst peacetime maritime disaster. Neil Oliver visits Mer Island to tell the story of its most famous son, Eddie Mabo, who spearheaded Australia’s land rights’ revolution. On Yam and Tudu Islands, Tim Flannery is on the trail of fearsome headhunters to unearth the significance of their historic practice. Part of the "Coast Australia" series.