To the Ends of the Earth

The opening travels from the North Pole to the South Pole encountering different climates and landscapes on the way. Animals highlighted in this episode include the polar bear (Ursus maritimus), the short-tailed shearwater (Puffinus tenuirostris), the humpback whale (Megaptera novaeangliae), the caribou (Rangifer tarandus), the gray wolf (Canis lupus) hunting for American bison (Bison bison), the great grey owl (Strix nebulosa), the gentoo penguin (Pygoscelis papua), the South American sea lion (Otaria flavescens), the killer whale (Orcinus orca) hunting for crabeater seal (Lobodon carcinophagus) and Weddell seal (Leptonychotes weddellii), a species of icefish (suborder Notothenioidei), and a species of sea spider (order Pantopoda).