Steve Backshall meets Leo Houlding

Steve Backshall is one of our leading natural history broadcasters. He's also an extreme sportsman who has conquered some of the world's most dangerous mountains. Despite suffering a severe rock-climbing injury in 2008 he continues to set himself extraordinary challenges.

In this programme, he meets Leo Houlding. Leo is one of our greatest rock-climbers. He has free-climbed the world's most challenging peaks and is an experienced base-jumper. One of his greatest achievements was a successful expedition to tackle an unclimbed route on Ulvetanna - a fearsome tower of granite in eastern Antarctica.

Producer: Karen Gregor.