The team talk to Dr Nicola Fox, Nasa's head of science, about her upbringing in Hitchin, Hertfordshire, and discover how she fell in love with the stars. Maggie Aderin-Pocock takes Nicky to the Imperial College London, where both women studied physics in the late 1980's. The pair revisit familiar haunts, discussing their experiences and the head of science's love of astrophysics
