The landmark natural history series returns presented by David Attenborough. Blue Planet II uses cutting edge breakthroughs in science and technology to explore new worlds, reveal astonishing creatures and extraordinary new animal behaviours. As we journey through our deep seas, coral reefs, open oceans, green seas and coasts we share these extraordinary new discoveries. But we now know that our ocean health is under threat. Never has there been a more crucial time to explore and examine what the future will hold for our blue planet. Featuring music by Hans Zimmer.