director, Werner Volkmer ; writer, Gwynne Dyer ; produced by Green Lion Productions, Inc. in association with the Canadian Broadcasting Corporation, with the participation of Telefilm Canada and Société générale des industries culturelles (SOGIC) [and] National Film Board of Canada ; producers, Catherine Mullins, Marrin Canell
Storyline Entertainment and The National Film Board of Canada present ; director, Michael Kot ; producers, Ed Barreveld, Michael Kot ; narration writer, Shelley Saywell ; produced by Storyline Entertainment, Inc. in co-production with The National Film Board of Canada, Ontario Centre ; in association with Canadian Broadcasting Corporation['s] The Nature of things, National Geographic Channel International