Expedition Killer Whale | Preview (BBC Two)

In a remote corner of Antarctica, a group of killer whales capture their prey in the most extraordinary fashion. Swimming together to create powerful waves, they can wash their seal prey off pieces of floating ice.

Hundreds of millions of people around the world have been gripped by one of the most sophisticated behaviours in the animal kingdom, when the whales became an overnight social media sensation, after featuring in Frozen Planet II. But we still know so little about them.

Now a team of scientists and filmmakers are returning to these icy waters to advance our understanding of these compelling animals and how they conduct this unique behaviour. Follow one scientist in the search for one particular pack of killer whales, because for him, this mission is personal.

Expedition Killer Whale airs Boxing Day at 6pm on BBC Two.