a ZDF HMR Produktion, Spiegel TV production in association with BBC and History Television Canada ; a film by Lutz Hachmeister and Michael Kloft ; directed by Lutz Hachmeiste ; script, Michael Kloft, Lutz Hachmeister ; an HMR Produktion Piegel TV production for ZDF
a film by Stefan Roloff ; executive producers, Stefan Roloff, Daniel Elias, David Houts ; produced for ZDF by When 6 is 9 Productions in association with Hybrid Films