Journey to three of the most exotic, mysterious, and remote islands on Earth: Madagascar, Borneo, and Hawaii. These isolated and iconic tropical islands harbor remarkable wildlife and human castaways found nowhere else on Earth. In a rapidly changing world, these fragile islands are a vital gauge for the health of the planet. Madagascar: Journey across ancient Madagascar, the strangest and oldest island on Earth. Over millennia it has given rise to more unique wildlife than any other island. Borneo: A journey from Borneo's rich coral reefs, through lush jungles, to its mountainous heart, reveals it is no paradise, and the struggles to survive are the secret to a greater variety of life than found on than almost any other island. Hawaii: Hawaii, the most remote island chain on Earth, offers sanctuary for wildlife that has reached its tropical shores. From humpback whales to waterfall-climbing fish, it's home to an extraordinary wealth of wildlife.