Inventors try to help a disabled man who dreams of snowboarding, a hairdresser who was born with one hand and a man who could die if his skin is exposed to sunlight.

Inventors try to help a boy with a rare form of epilepsy, a man with cerebral palsy who loves sailing and an older woman with multiple sclerosis who lives on her own.

12-year-old Pollyanna lost her leg in a horrific accident when she was just two years old. She was waiting at a bus stop with her mother and grandmother when a bus careered into them, killing her grandmother and seriously injuring her and her mother. In the last ten years she has had 21 operations and been fitted with more than 20 different prosthetic legs as she has grown up. Despite the challenges she has faced, Pollyanna has a determination not to let her disability hold her back from achieving her goals, including her dream of becoming a ballerina. But the ballet world is unforgiving and Pollyanna has been marked down in exams for being unable to do moves that would involve her missing leg, including going up on her toes - or demi-pointe. Engineer Yusuf Mohammed takes up the challenge to build her a prosthetic leg with the required movement in the foot. 73-year-old Bobby was born with brittle bone disease which has gradually resulted in him losing his hearing. The nerve endings in his ears are too damaged to have a hearing aid and Bobby's friends have known him since before he went deaf so they have never learnt to communicate with him through sign language. Due to advancing age, his lip reading skills are in decline and he struggles to understand anyone other than his wife Linda. In social situations this means that she must stay by his side and try to relay conversations - an arduous task which makes socialising increasingly difficult. Technologist and software engineer Akram Hussein jumps at the chance to see if he can help Bobby re-join group conversations with his friends. And he is willing to go the extra mile - even getting his ears temporarily filled with silicone so that he can experience what life is like for Bobby. Tobijah was paralysed from the chest down in a car accident. The accident severely damaged his spinal cord and the signals from his brain no longer reach the nerves in his hands. As a result, he is no longer able to open and close his

In this episode, the fixers take on three more challenges to change lives, including one of their toughest yet when they try to help a young boy with Tourette's to control his tics and behavioural issues. Eleven-year-old Malachi lives with his mum and younger brother in Cornwall. Malachi has Tourette's Syndrome, a neurological condition characterised by involuntary movements and noises called tics. He also has Attention Deficit Hyperactivity Disorder and struggles with disruptive urges and violent outbursts. At school, he needs three support workers with him at all times. As Malachi gets older, his behaviour is increasingly difficult for mum Marie to manage, and she is increasingly worried that if he doesn't find a way to control himself, he will end up in serious trouble. Electronics engineer Ryan White teams up with Zoe Laughlin, an expert in materials, to explore what they can do. But their first encounter with Malachi leaves them concerned that they may have taken on more than they can manage. Knowing more about the condition could help them work out what to do, so their next stop is Great Ormond Street Hospital in London to meet one of the world's leading experts in the field, Dr Tara Murphy. Four-year-old Jasper suffered complications after contracting hand, foot and mouth disease when he was one years old. He had a heart attack and a stroke in his spine which left him paralysed from the waist down. His parents have sought the best medical help they can get for their son, in the hope that he will one day be able to walk again, but so far he has only gained enough strength to be able to crawl. They are hoping that the team can come up with an invention that will enable Jasper to be upright and moving his legs, so that he can work on building the strength in his muscles and get used to being in a standing position. Technologist and designer Haiyan Jang takes up the challenge and enlists the help of inventor and engineer Yusuf Mohammed to help search for a