On the other side of the world under the crystal clear blue waters of the Pacific Ocean lies one of the most enchanting places on the planet. Over ten thousand miles away on the north eastern coast of Australia lies the Great Barrier Reef, one of the natural wonders of our world. It provides shelter to some hidden wildlife sanctuaries that contain some magical marine creatures. Iolo Williams dives deep beneath the surface of the coral sea to discover what state this natural wonder is in. He travels from the extreme swells of the northern part of the reef right down to the cooler pristine corals of the south. He discovers how healthy the Great Barrier Reef really is in some of its key locations to see and find out if there are real signs of hope the reef can survive the threat of global warming.
In the wilds of the Canadian Rocky Mountains, a mother moose tends to her newborn calf. Spring is in full swing, but this far north, winter is never far away and, with hungry bears and wolves for neighbours, many challenges lie ahead. Local cameraman Hugo Kitching knows this only too well, but he is determined to follow the mother and calf through the four seasons. What unfolds is a very intimate story, and when Hugo finds a second moose calf born late in the year, things take an unexpected and dramatic turn.
Of the more than 180 invasive species found in the Great Lakes, two in particular stand out for their indiscriminate devastation: the fast-breeding Asian carp and the deadly sea lamprey. Join the front lines of an urgent battle to limit the impact of their ecological damage.
Africa's largest herd of elephants and a fearless pride of young lions come face to face in an epic fight for survival. Rarely do their worlds collide, until now. This is no chance conflict; nature has played its part. Drought has weakened the elephants, and the lions are desperately hungry. The dawn of the giant killers has arrived.
Just off the southern coast of Africa, beneath the warm waters of the Indian Ocean, lies a safe zone created by a unique confluence of geography and climate: a sanctuary with a vibrant concentration of dazzling aquatic life. Embark on an underwater adventure into a marine wilderness stronghold.