What could have been a very good documentary about Shackleton's epic voyage, with well-recreated scenes, was wrecked by a constant drip of the well-trodden climate change mantra. Yes we know about climate change, so shut up please. It would have been interesting to compare the travails of a modern explorer with an Edwardian one, but all he could talk about was climate change Shut up.
The VO for Shackleton also sounded wrong to me, more like Richard Burton reading 'Under Milk Wood'.