The Blue Planet is one of the greatest nature documentaries ever made, squarely focusing on life in the oceans. It brought us some ground breaking footage of the creates that live there and gave us an unclose and personal look at the habitats that they survive and thrive in. It also taught us the importance of keeping our oceans clean and well protected. Now, a second Blue Planet documentary series is in the works and set to premiere on the BBC later this year. This spectacular five minute trailer gives us an idea of what to expect, and if the footage here is any indication, we’re in for another treat. Narrated by Sir David Attenborough of course.