The National Film Board of Canada ; directed and photographed by John Spotton ; produced by Julian Biggs. The railrodder / The National Film Board of Canada ; written and directed by Gerald Potterton ; produced by Julian Biggs
Discovery Films ; Image Entertainment ; ThinkFilm ; a film by Werner Herzog ; directed, written and narrated by Werner Herzog ; produced by Henry Kaiser ; executive producer, Erik Nelson ; produced by Creative Differences Productions, Inc. for the Discovery Channel