written and produced by Martin Williams ; directed by Lara Acaster, Alex Williams ; produced for Nova by Joseph McMaster ; a Pioneer Productions film for Nova/WGBH and Channel 4 ; WGBH Educational Foundation
a Frontline co-production with Kirk Documentary Group, Ltd. ; a production of WGBH-TV Boston ; produced by Michael Kirk, Jim Gilmore, Mike Wiser ; written and directed by Michael Kirk