written by Stephen Lyons & Llewellyn M. Smith ; directed by Llewellyn M. Smith ; produced by Llewellyn M. Smith, Stephen Lyons ; a Nova production for WGBH Boston ; WGBH Educational Foundation
produced by Peter Frumkin ; written and directed by Nancy Porter ; co-producer, Jennifer Pearce ; a film by Nancy Porter Productions, Inc. for Nova in association with WGBH/Boston