The team that produced the Emmy-winning `Planet Earth' series - the BBC Natural History Unit and Discovery Channel - combine forces once again for this sweeping seven-part documentary. Shot entirely in high-definition and featuring cutting-edge cinematography to capture undisturbed observations of animal behaviour, `Frozen Planet' chronicles the ecosystems and animals of the Arctic and Antarctic, where the filmmakers spent more than 2,300 days in the field and 18 months at sea to record unprecedented footage. Episodes track the lives of polar bears, wolves, killer whales and penguins from the spring through the winter, and there is also a `making of' episode that details the challenges faced by the "Frozen Planet" team. The series is narrated by Alec Baldwin; the seventh episode - a look at the effect global warming is having on not only the poles but also the rest of the planet - is hosted by British naturalist Sir David Attenborough.