If you decide to watch "Frozen Planet", you might want to think twice if you are squeamish or if you're watching with small children. This is because it depicts nature in the raw...and that sometimes means footage of animals killing each other or dying from exposure. I personally prefer this over an overly sanitized program...but it's best you know and understand this so you can make the appropriate choice.
The film is about both the Arctic and Antarctica and most of the episodes consist of showing the same season in each region. So, for example, the summer in the Arctic would be June-September but in Antarctica you are seeing its summer from December-March. During the course of the episodes you see the usual amazing footage you see in the other recent "Earth" documentaries with David Attenborough...and you often marvel at the people who went to such lengths to get such perfect film. Pretty amazing...and marvelous on a large television.
I think this is a nearly perfect show. My only complaint, and it's a minor one, is that some of the material is repetitive and really noticable if you are binging on the show. I honestly feel they could have edited out an episode or two to make it much more compact.