Sir David Attenborough unearths a once-in-a-lifetime discovery: the fossil of a giant pliosaur, the largest Jurassic predator ever known. Follow a team of forensic experts on a perilous expedition to excavate the skull, uncover the predatory secrets lying deep inside the fossil, and unlock clues about the life of this giant sea beast.

Nature documentaries presenter Liz Bonnin shows the various tactics animals use to survive in some of the coldest places on Earth.