In the futuristic setting of the Laboratory of Neuro Imaging at the University of California, Los Angeles, Alan gets a highly detailed scan of his brain - which for a man in his early 70s, is in remarkably good shape. This image, projected on a huge curved screen behind him, is the starting point for a search within his brain - as well as the brains of others - for the essential components of the Human Spark; a search informed by what the previous two programs have revealed about the attributes that make humans unique.