TV Guide Yesterday Sunday

David Attenborough investigates the opportunities tides create for marine life, showing giant stingrays gliding on currents for a rest, South African sea snails surfing the waves in pursuit of a meal, crabs playing football on a beach, and bottlenose dolphins embarking on a dangerous game of catch. In the oceanic world each turn of the tide can mean life or death for its inhabitants

Exploring the wealth of marine life that inhabits the ocean's edge, dealing with the dangers of an ever-shifting environment. David Attenborough observes nesting seabirds in east Russia, Patagonian killer whales, Newfoundland caplin fish, walruses, and Brazilian green turtles - which make their annual expedition to an island in the middle of the Atlantic to lay their eggs

Footage of marine life in different environments around the north, beginning with a tropical coral reef which has medicinal properties for dolphins, and is used as a tool by tusk fish. In Japan, a shipwreck is home to the Asian sheephead wrasse, which can change gender, while in the polar north, walruses struggle to find ice floes for their pups to rest on as climate change takes its toll on the environment

Creatures that live in volcanic hot spots on the ocean bed, areas that reach temperatures hot enough to melt lead and which may hold the secrets behind all life on Earth. Other strange creatures from the depths of the sea include bone-eating worms, fish that walk rather than swim, and hordes of squid. Plus, footage of sharks in a feeding frenzy over the dead body of a whale and the wildlife of the Midnight Zone in the Pacific, an area that never receives any natural light, forcing creatures to rely on their own bioluminescence