National Geographic: Drain the Ocean

Though the ocean covers roughly three-quarters of planet Earth's surface, not even the world's top scientists and explorers can tell us exactly what we'd find if we were somehow able to take a stroll at the bottom of the sea. In this documentary, filmmakers combine the latest scientific research with state of the art computer-generated animation to offer a tantalizing glimpse of the mysterious world that houses more than half of our planet's species, but remains a vast mystery to all who reside above the waves.