Professor Jim Al-Khalili, OBE is an academic, author and broadcaster. He is a leading theoretical physicist based at the University of Surrey, where he teaches and carries out research in quantum mechanics. Professor Johnjoe McFadden is Professor of Molecular Genetics at the University of Surrey and is the editor of leading text books on both molecular biology and systems biology of tuberculosis. For over a decade, he has specialised in examining tuberculosis and meningitis.