New Captain Gavin Pritchard is put to the test as engine trouble, a nasty blizzard and a fighting sailor interrupt the crew's work.
With another season in Antarctica fast approaching, Captain Bob Tarrant prepares to hand over the HMS Endurance to a new skipper.
Now in South Georgia, the Endurance crew assist the British Antarctic Survey. Also, four Marines retrace the famous 'Shackleton Walk'.
With the Endurance taking in water due to a faulty valve and stuck, powerless, at the mercy of the sea, the crew move fast to avoid capsizing.
