Renowned polar cameraman and diver Doug Allan revisits some of his most thrilling experiences and returns to the icy waters of a Highland river, where his underwater journey first began.
Gordon Buchanan and Mark Smith share how the wildlife-tracking expertise developed in Scotland enabled them to capture some of nature's most intimate moments, such as being the first to film wild pandas mating and snow leopards hunting.
John Aitchison and Mark Smith share some of the unexpected locations where they have filmed birdlife, ranging from a rubbish dump in Delhi to a motorway flyover near Birmingham.
Doug Anderson and Doug Allan discuss the challenges of underwater filming, with creatures as diverse as blue whales, white-tip sharks, and the weedy sea dragon-a small creature whose courtship dance is as delicate and elegant as a ballet.
