David Attenborough narrates `Frozen Planet II', an exploration of the wildlife in some of the coldest regions found in the world. Premiering eleven years after the original series, `Frozen Planet II' benefits from the considerable advances in camera technology since the original. Whether capturing microscopic cracks in ice under baby penguins' feet, or using light-weight drones to follow an avalanche running down a mountain, a new set of eclectic visuals emerge that celebrates the colder regions and warns of what is lost in the face of global warming.

• David Attenborough