Episode 4 deals with Cook's second voyage aboard the Resolution in search of the Great Southern Continent. He circumnavigates the Antarctic, without ever sighting land – an extraordinary achievement in a flimsy ship at such latitudes. During this feat he begins the painstaking process of filling in vast unknown areas on the Pacific map. Sam visits New Zealand, Tonga, Vanuatu, and Norfolk Island before completing one of Cook's unfinished ambitions by touching down on Antarctica.

For Sam this episode, in a much more intimate way, mirrors what many consider Cook's greatest achievement, the breadth and extent of the second voyage. In Sam's case, Antarctica is a first as is reaching the crater of a very active volcano, Mt Yasur. And significantly visiting Norfolk Island where standing in the ruins of its penal settlement Sam acknowledges an intersection of Pacific and Cook history with his own family in a startling revelation.

The last in the six part series following Sam Neill travelling in the wake of Captain Cook around the Pacific, 250 years on from when Cook made his first voyage. In a bid to find the not yet existent North West passage Cook encountered vast ice ranges and saw the impact of colonisation first hand when entering part of Alaska already overtaken by the Russians. Forced back by the ice shelf Cook retreats to Hawaii for R&R before returning to the Arctic the following summer. But that was not to be.

After nearly eleven years of voyaging from the Antarctic to the Arctic Circles trading, observing, befriending chiefs and villagers alike, even participating in local culture Cook is clubbed and stabbed and drowned in a quintessentially tropical paradise? How did it come to this? Or as one of the people Sam meets says, ‘How did it not happen before?'

Back in Australia Sam views an unfinished tapa waistcoat abandoned by Elizabeth Cook after his death – a poignant memento. A larger than life stainless steel sculpture of the man by Micheal Parakowhai is the focus of Sam's reflections on Cook. Finally on an uninhabited islet in mid- Pacific Sam concludes his journey from being a ‘mere actor' when he set out to becoming ‘a man of the Pacific.'