One Life is a great eighty-minute nature documentary for newbies, but for fans of the genre, it's reused footage form Life.
The Blue Planet is a bit dated, but still looks amazing, and introduces us to mysterious under-sea life.
Africa shows us how the continent has changed, and provides a reason to preserve the varied life within.
These are budget 3D titles in every respect except the one that could have helped them out: price.
Frozen Planet is a rich look at life on both poles of this planet, a rich treat for the family.
Frozen Planet has a wonderful balance of entertainment and educational structure, and contains some of BBC Earth's most exquisite photography.
Ocean Giants, from the BBC, explores the characteristics and intelligence of whales and dolphins.
Ocean Giants is a lesser entry in the BBC Earth family, with some nice photography that is, unfortunately, rarely engaging.
Planet Earth is now available in a Limited Collector's Set, with the discs housed inside a globe.
While not a replacement for either Planet Earth or Life, this new offering feels just as intriguing.