These exploration adventures are a favorite genre of mine, and it's just plain difficult to fault Kenneth Branagh, anytime.
We all know the story. So the value of the movie depends upon how well it dramatizes what happened. Admittedly, I already WANT to like "Shackleton," and take with me a high regard for Branagh's acting ability before I ever sit down to watch.
There is just enough in here with his wife and kids (and mistress) to matter, and that was a good call. We are at first shown what a harrowing ordeal it can be to find MONEY in order to do what he wants to do. Soon enough, everything goes awry, and it's almost, though not quite, an entirely different story from then onward. I think it's well done.http://www.imdb.com/title/tt0272839/?ref_=nv_sr_1