Hoping to determine the effect of volcanoes on climate change, George heads to the island nation of Vanuatu where he rappels into the fiery crater of one of the world’s most active volcanoes.

George heads Down Under during fire season to see if climate change is slowly causing Australia to become uninhabitable. He joins a team of sophisticated firefighters in the South Australia, but what starts as a low-intensity bush fire quickly becomes a raging inferno.

On his first-ever expedition to Siberia, George witnesses the alarming effect of melting permafrost, visits a 12,000-year-old dog, and camps out with reindeer herders on the chilliest night of his life.

George crisscrosses Laos to witness a nation entering the modern world. He comes across ancient farming techniques, visits a conservation center that provides elephants a new way of life, explores an abandoned cave city, and paddles an underground river that holds some timely secrets.

George heads to the iceberg capital of the world — Newfoundland, Canada — for an up-close look at these floating giants from above, from below, and from the very top of a frozen mountain on the move.