Three iconic adventurers - newsman John Simpson, polar explorer Ranulph Fiennes and solo yachtsman Robin Knox-Johnston - go on a newsgathering trip to war-torn Afghanistan, attempt to sail around the most notorious of all maritime landmarks, Cape Horn, situated at the southernmost tip of South America, and man-haul sledges across the frozen sea ice of the Canadian Arctic.

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Ranulph Fiennes

John Simpson

Robin Knox-Johnston