producer, Stuart Clarke ; US producer, Katie Gilbert ; directors, Stuart Clarke, Lawrence Channon, Geoff Evans, David Zigerelli, Ben Mole, Stephen Mizelas ; produced by Wild Dream Films for H2 Network
written and produced by Michael Douglas ; executive producer, Chris Schmidt ; directed and filmed by Tom Fowlie ; produced by Melanie Gerry ; a NOVA production by Blink Films for WGBH/Boston