executive producer & written by Peter Greenberg ; directed by John Feist ; editor, Gordon Recht ; producers, Kathy Jackoway, Gordon Recht, Piotr C. Sliwowoski
a co-production of the NOVA/WGBH Science Unit and Vulcan Productions, Inc., a film by Kunhardt McGee Productions ; produced by Chana Gazit and Mary Robertson ; written by Chana Gazit and Daniel Gilbert ; directed by Chana Gazit
a film by Gretchen Sorin and Ric Burns ; produced by Emily Pfeil, Emir Lewis, Steven Bennett, Kathryn Clinard ; written & directed by Ric Burns and Gretchen Sorin ; a production of Steeplechase Films
a Boyd Productions documentary ; director, Jennifer Boyd ; producers, Jennifer Boyd, Lindsay Thompson ; writers, Jennifer Boyd, Chad Ervin, Lindsay Thompson
a production of Florentine Films and WETA Television ; written by Geoffrey C. Ward ; produced by Sarah Botstein, Lynn Novick and Ken Burns ; directed by Ken Burns and Lynn Novick