Part two of this four-part dramatisation of intrepid explorer Sir Ernest Shackleton's attempt to cross the South Pole.
It is October 1914 and shortly after Shackleton's vessel Endurance sets sail from South America, a stowaway is discovered. Blackborow (Celyn Jones) is a young Welshman who had not been allowed to join the crew because of his age. He pleads his case and is allowed to stay, amid dark threats that stowaways are the first to be eaten if the crew goes hungry.
They reach a South Georgia whaling station, at which Shackleton (Kenneth Branagh, above) is advised the ice is too severe for him to reach his destination - advice he chooses to ignore.
Endurance sets sail once more with the crew in high spirits, but while they are still more than 1,600 kilometres from their destination, pack ice is spotted - as predicted by the whalers. The single-minded Shackleton forges on despite the heavy weather Endurance is making of the journey.