Ernie travels to Bathurst Island to meet a dedicated and passionate nun, a woman working with young families, and two local artists who share their love for their culture.

Ernie meets three very interesting Darwin locals, each with their own connection to the land and to the wildlife that inhabits it.

Michael Portillo reaches the most westerly station in Wales on the final leg of his rail journey along the southern coastline. At Milford Haven, Michael learns from the harbourmaster about the biggest energy port in the United Kingdom, which has an oil refinery and storage terminals, as well as natural gas terminals. Further along the estuary at Pembroke Dock, Michael visits a pioneering project to harness the power of the sea.

This episode heads to the seclusion of the Serra Da Mantiqueira Mountains, Brazil, to explore a sprawling 2000-square-metre, grid-shaped family home that is completely hidden in nature. We visit a wartime bunker on the Isle of Wight in the UK that's been tastefully transformed into an ultra-modern home. We head to the city of San Francisco to hunt out a hidden gem on winding Lombard Street, an ultra-modern home hidden behind a sleek facade designed to blend with its neighbours. And we visit an author's paradise on the remote coast of Nova Scotia, Canada: a super sleek home devoted to his incredible collection of books.