["DVD","Digi-Pack","Multi Disc","Other: 110 minutes of behind the scenes footage - one 10-minute behind the scenes program for each episode (SD release only) Documentary: <i>Planet Earth - The Future<\/i>: This 3-part 2 1\/2 hour series looks at what the future may hold for endangered animals habitats and -- ultimately -- ourselves. Following the environmental issues raised by Planet Earth it asks why so many species are threatened and how they can be protected in future. (SD release only)"]