a Frontline production with Kirk Documentary Group ; produced by Michael Kirk, Jim Gilmore, Mike Wiser ; written by Michael Kirk & Mike Wiser ; directed by Michael Kirk
produced for NOVA by BBC for WGBH Boston ; produced and directed by Guy Smith ; series producer (BBC), Zoe Heron ; managing director (NOVA), Alan Ritsko
a co-production of JTN Productions and Thirteen ; in association with NDR and WNET.org ; produced and directed by Mike Dewitt ; written by Mike Dewitt, Daniel Jonah Goldhagen