Wildlife cameraman Gordon Buchanan teams up with some pioneering animal scientists to explore stories of animals lives as "told" by the critters themselves, via cameras that are custom-built to fit unobtrusively on the animals. In part one, "Oceans," viewers are given a first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets. Part 2, "Australia," airs next Wednesday.