Blue Planet II

8PM, BBC1

Covering 70 per cent of the Earth’s surface, the oceans are so vast, it’s almost impossible to comprehend. And yet, they are still Earth’s least explored areas, full of mystery and wonder. Sixteen years since the first series, the eagerly awaited follow-up from

David Attenborough and the BBC Natural History Unit finally arrives – and it doesn’t disappoint. This first episode introduces some of the many different ‘creatures beyond our imagination’ – including the Asian sheepshead wrasse (right) – that live beneath the waves. Prepare to be dazzled.