Bullfrog Films presents ; directed by David Springbett ; producers, David Springbett, Heather MacAndrew ; writer, Heather MacAndrew ; produced by Asterisk Productions ; produced in association with the Canadian Broadcasting Corporation
written and directed by Andreas Ewels, Norbert Porta ; production ZDF, Alexandre Kegler, Sigrid Beck ; produced by Norbert Porta Sciencedocu on behalf of ZDF