Churchill Pictures ; a BBC-tv production in association with RKO Pictures, Inc., Canale 5, Italy, FR3, France, YLE, Finland ; producer, John Lynch ; written and presented by James Burke
a co-production of FIT Production, La Cinquième, and Canal Sur Televisión ; un film conc̦u et écrit par Mahmoud Hussein ; réalisé par Philippe Calderon
a presentation of Microangelo Educational Media LLC by arrangement with Public Media, Inc. and SOGEPAQ ; Sogetel presents in association with the Smithsonian Institution, Quinto Centenario España a series produced by Michael Gill ; written and presented by Carlos Fuentes ; producer, Annie Dodds
Samuel Bronston presents ; written by Fredric M. Frank and Philip Yordan ; Italian version by Diego Fabbri ; produced by Samuel Bronston ; directed by Anthony Mann ; a Samuel Bronston production in association with Dear Film Production
Samuel Bronston Productions ; produced by Samuel Bronston ; story by Fredric M. Frank ; screenplay by Philip Yordan, Fredric M. Frank, Ben Barzman ; directed by Anthony Mann