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The Blue Planet

Episode 1: Introduction

Duration: 58 minutes

First broadcast: on BBC One CambridgeshireLatest broadcast: on BBC Two HD

Available for 4 months

Although 70 per cent of our planet is covered by water, the oceans and many of their inhabitants - such as the blue whale - remain an unexplored mystery. This edition travels to the very depths of the seas to reveal a spectacular variety of life - from alien monsters of the deep to pack-hunting killer whales attacking a grey whale calf. Show less

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