Reparto (por orden de créditos)
Gore Vidal
Self - Narrator (voice)
Lawrence McGinty
Self - Science Editor, ITN
Martin Bobrow
Self - Professor, Cambridge University
David Baltimore
Self - Doctor & Former President, Caltech
John Burn
Self - Medical Director, Newcastle University
Gregory Stock
Self - Doctor & CEO, Signum Biosciences
Glenn McGee
Self - Editor-in-Chief, The American Journal of Bioethics
Lee M. Silver
Self - Professor, Princeton University