In the fifth episode of this six part science series, Dara O Briain and his crack team of experts take a weird and wonderful look at the brain. Dara traces the brain's journey from a useless organ once ditched by Egyptian embalmers to the centre of everything that makes us human. Science journalist Alok Jha asks whether smart drugs really make you brainier, oceanographer Helen Czerski explores cutting edge therapies allowing the brain to control limbs remotely and materials scientist Mark Miodownik takes apart a smart phone.