Dan unravels the mystery surrounding George Mallory and Andrew Irvine's daring attempt to conquer Mount Everest in 1924 - a feat that could have made them the first to stand atop the world's highest peak. He tells the tale of Irvine and Mallory's ascent into the 'Death Zone' where they embarked on their final summit push amidst biting winds and punishing altitudes. Dan also hears from world-renowned climber Jake Norton who was part of an expedition in 1999 to find out what happened to the climbers and describes the group's truly astonishing discovery.

Written and produced by Dan Snow, and James Hickmann and edited by Dougal Patmore

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