David Attenborough Frozen Planet II BBC1, 8pm

David Attenborough narrates a glimpse of the wildlife of the Arctic Ocean. Polar bears lead their cubs to hunt, beluga whales trapped by ice see the possibility of escape, harp seals teach their pups to swim, and bowhead whales come in search of food. Plus, a look at how the region is warming faster than anywhere else on Earth due to climate change.