At the age of 23, Ash Dykes became the first person to walk, solo and unsupported, across Mongolia. His journey took 78 days and saw him trek over the Altai Mountains, the Gobi Desert and the Mongolian Steppe. It was an expedition filled with danger and extreme conditions. He almost didn't make it.

A year later, Ash spent more than five months traversing the length of Madagascar via its eight highest peaks and through the civil unrest that was brewing in the south. It was another world first.

In Mission: Possible, Ash reveals the spirit, planning, training and sheer determination that went into these two record-breaking feats. Along the way, we discover how a young man from Wales transformed himself into one of the world's most acclaimed and exciting young adventurers. It is an inspirational story.