directors, Mike Slee, Nigel Simpkiss ; producer & director, Nick Shoolingin-Jordan ; series producer, Arif Nurmohamed ; a BBC/Discovery Channel co-production
a Nova production for WGBH/Boston and Channel 4 in association with David Hickman Films, Sveriges Television, and Norddeutscher Rundfunk ; writers, Julia Cort and Brian Greene ; directors, Julia Cort and Joseph McMaster