The Blue Planet, the definitive exploration of the Earth's final frontier is now over. From the deep to the shore, from pole to pole it revealed extraordinary life and behaviour that had never before been filmed. In some cases the species were only recently known to scientists.The series took almost five years to make, involving nearly 200 filming locations. The fact that most of the ocean environment remains a mystery presented the production team with many challenges. Besides witnessing animal behaviour for the first time, the crew also observed some that were new to science. The producers were helped by marine scientists all over the world with state of the art equipment.