Planet Earth - Ocean Deep

David Attenborough narrates the final episode in the documentary series that shows our planet in all its glory. In this part, a look at life deep undersea. A 30-tonne whale shark gorges on a school of fish and a unique overhead camera reveals common dolphins rocketing at speed. Descending into the abyss, deep sea octopus fly with wings and vampire squid use bioluminescence to create a colour display. Time-lapse footage taken from 2,000m down captures eels, crabs and giant isopods eating.