a co-production of WGBH, Boston and Brian Lapping Associates in association with BBC and La Sept/ARTE ; producer/directors, Dai Richards ... [and others]
a production of Yale University Films for Frontline ; WGBH Educational Foundation ; WGBH Boston ; producer-director, William Peters ; writers, William Peters, Charlie Cobb
an Invision Productions Limited production in association with Heights Productions, Inc. and WGBH Boston, with the assistance of Lion Television Limited ; series producer, William Cran