Blue Planet II

Four years in the making, this landmark new series is yet another triumph for the BBC Natural History Unit. Sixteen years after the first Blue Planet, the team are back to explore the wide variety of life that lives below the water – including those wonderful bottlenose dolphins (above) – with new diving and camera technology allowing them to get closer and go deeper than ever before. As you would expect, the images are mind-blowing, the wildlife amazing and the underwater stories compelling. However, what’s different this time is the rather sombre tone of David Attenborough’s narration, which highlights the devastating impact that man’s actions are having on these fragile ecosystems (see left). Tomorrow, 8pm, BBC1.