The 50 best shows of 2017: No 4 Blue Planet II

This majestic ocean tour was not only gorgeous viewing, but brought scientific discovery and a timely reminder of ecological fragilityWith Blue Planet II, Sir David Attenborough captivated audiences once again and helped the BBC grab more viewers than Strictly, Simon Cowell doling out stink or indeed any other TV show in the UK. And all with the magic of the natural world. Four years in the making, and 16 years on from his original series, this latest seven-episode tour of the oceans came comple