Ambrose Video Publishing ; a co-production of Maryland Public Television with Film Australia, Wisemans and Electric Image U.K., in association with Principal ; producer, Richard Sattin ; director, Mike Slee ; writer, James Burke ; editor, Budge Tremlett
Granada ; made with the co-operation of Anglesey Aluminum Metal Ltd., Aughinnish Alumina, British Rail ; University of Manchester Institute of Science and Technology, Department of Chemistry ; produced and directed by Jack Smith