The sun returns after months of darkness, dynamically transforming the landscape. Millions of migrants join the hardy residents as they find mates and begin to breed.
| Title | Spring |
|---|---|
| Genres | Documentary |
| Release Date | 2011-11-02 |
| Episode Runtime | 00 Hours 50 Minutes |
| Season Number | 1 |
| Episode Number | 2 |
| Production Companies | BBC, Discovery Channel, Atresmedia, ZDF, Skai, The Open University |
