HMS Erebus was one of the great exploring ships, a veteran of groundbreaking expeditions to the ends of the Earth. In 1848, it disappeared in the Arctic, its fate a mystery. In 2014, it was found. Michael Palin brings the remarkable Erebus back to life, following it from its launch in 1826 to the epic voyages of discovery that led to glory in the Antarctic and to ultimate catastrophe in the Arctic. From the Monty Python star and television globetrotter.