1/2. Waiting for Daniel. Linda Balls 's brother died from Duchenne muscular dystrophy when he was 13. Now her three-year-old son has developed the terminal disease and he faces a future of muscle wastage, wheelchairs, ventilators and probable early death. Linda meets top scientists to explore the realities of living with the disease and to investigate scientific breakthroughs that could potentially transform her son's life. Producer Lucy Dichmont