Jo Brand presents with Matt Baker as Alex Jones takes her first steps on The Rock for her Sport Relief Challenge. Guest Louis Theroux talks about his new series LA Stories.There is live footage of Alex Jones rock-climbing in Utah throughout the show. Also, from Alex's recent trip to the Philippines, a mum is still struggling to find shelter for her two children following the destruction caused by Typhoon Haiyan.Also in the studio is the cyborg Neil Harbisson, who has attached a camera permanently to his skull. He explains how it helps him "hear" colours, having been born with only black and white vision.