Shark expert Enric Sala and his team of scientists begin their search for these deep sea monsters with a high seas adventure, setting out from Chile to brave the tempestuous Southern Pacific Ocean. Their first stop, Easter Island, is a land of mammoth stone statues and a population with a cultural memory full of catastrophes. Diving underwater reveals an ocean desert that the team are quick to document.

As springtime dawns on the frozen landscape of Canada's high Arctic, Adam Ravetch sets off in search of one of the region's most massive and misunderstood animals - the walrus. Known as Man " The Walrus Man" Ravetch has devoted much of his career to documenting the lives of these tusked giants. Ravetch is on a mission to capture on film the drama when polar bears and walruses meet face-to-face. He also captures the unique and rarely seen behaviours of mother walruses and their newborn calves. At first glance, the eastern Canadian Arctic seems to be a place of frozen desolation. But, here amidst the ice floes, walruses live an arctic existence, battling with the elements and against predators for survival. Weighing up to two tons, walruses paint a familiar picture with their characteristic tusks and bristly moustaches. But amazingly, much about these animals remains a mystery. It is Ravetch's goal to unlock the secrets of these unique creatures. In Battle of the Arctic Giants Ravetch captures what is believed to be the first underwater footage of a female walrus as she nurses and protects her newborn calf. And, he also films a polar bear rushing into a walrus herd and killing a calf, even facing down the calf's huge, tusk wielding mother as she tries in vain to thwart the attack. From the tender to the terrifying, scenes like these illustrate the extreme contrasts in this rugged landscape. On an epic journey that takes him onto drifting ice floes, diving into sub-zero waters and camping alone on a tiny island with hungry polar bears as neighbours, Ravetch captures the drama of walruses' real-life struggles as spring turns to summer in the frozen Arctic.

Descending with commando-like precision into deadly saltwater crocodile nests, Matt Wright must collect crocodile eggs so the locals in Australia

This is the story of two marine giants. One predator. The other prey. Following them, a team of marine biologists who want to attach a remote camera to a sperm whale to record what happens a thousand feet beneath the sea. This high seas adventure tests everything they’ve got. It’s a mission into the deep, a mission into the unknown. A scientific quest to understand one of the world’s greatest wildlife mysteries.

Archaeologists and scholars investigate the real Scorpion King whose achievements may have layed the foundations of Egypt.