This episode of National Geographic's award-winning children's series plumbs the world's oceans, taking youngsters on a guided tour of the planet's final frontier. An animated globe (voiced by Dudley Moore) narrates as cameras get up close and personal with whales, jellyfish, penguins, starfish and other amazing creatures of the deep. Highlights include a visit to Australia's Great Barrier Reef and watching an octopus outsmart an eel.