Feature documentary about legendary oceanographer, marine biologist, environmentalist and National Geographic Explorer-in-Residence Sylvia Earle, and her campaign to create a global network of protected marine sanctuaries

Diving Deep: The Life and Times of Mike deGruy, tells the story of Mike deGruy, an irrepressibly curious and enthusiastic underwater filmmaker who died suddenly in 2012. DeGruy filmed the oceans for more than three decades becoming as famous for his on camera storytelling as for his glorious, intimate visions of the sea and the creatures who live in it. Inspired to share his legacy as a filmmaker and storyteller, and to spread his mission for protecting the ocean, his wife and filmmaking partner Mimi deGruy returned to the edit room to produce Diving Deep: The Life and Times of Mike deGruy.

Peter Snow presents highlights from today's three deep-sea dives around the world. In 2002 BBC organized three concurrent dives , first in Monterey Bay where unmanned submersible is lowered into underwater canyon which is over mile deep. Second dive is in Grand Cayman where submersible Atlantis will explore life at the spectacular Cayman Wall , Kate Humble reports . During the dive, the crew used bait to attract a deep-water giant, the six-gill shark. Third dive takes place in middle of the Atlantic 1200 miles west of Portugal, which is also deepest of the three dives, divers will descent in Russian submersible Mir from research vessel Keldish and the Mir will dive in the bottom of the ocean in 2300 metres .

Plunge the ocean depths with renowned filmmaker and shark expert Michael deGruy as he takes you to the underwater realm of sharks!