But now researchers say that after 40 years of scouring the planet’s blue waters they’ve finally found a mysterious shark species they knew existed, but could never find proof of.

Take a look behind the scenes of making Blue Planet II and further uncover ... exclusive access and a fascinating look at the deep sea. Presented by Becky Ripley and Emily Knight.

The Blue Planet II team have gone to great lengths ... or the rocketing explosion of methane from the Deep Sea bed. This helps convey the experience of ‘being there’ that is important for ...

Now 15 years later David Attenborough returns to the narrators chair as Blue Planet II re-explores the deep in stunning detail. Photo credit: (c) BBC / Lisa Labinjoh / Joe Platko 2017 ...