Plot: Adventurer and conservationist Steve Backshall has first-hand, free-diving encounters with mighty Sperm whales and intelligent, caring humpback whales; smart but deadly Orcas; and ingenious Bottlenose Dolphins across the Atlantic, Pacific and Indian oceans. Using cutting-edge technology, from diver propulsion vehicles to tiny, high-quality drone cameras and split-rig cameras to film above and below the surface simultaneously, Backshall and the team capture never-before-seen behaviors and provide an immersive experience