The results of several months filming and trekking in remote rainforests, islands, and coastal wilds of Southeast Alaska for episode 6 of BBC’s blue-chip natural history series. From brown bears emerging from hibernation to gray whales feasting during the explosive herring run—and even capturing rare footage of nocturnal northern flying squirrels—this shoot pushed both gear and stamina in one of North America's most rugged ecosystems. Now streaming on Amazon Prime here.