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
a Nova production by Green Umbrella, LLC for WGBH/Boston in association with Boston Science Communications, Inc. and Sveriges Television ; produced and directed by David Axelrod ; written by David Axelrod and Michael Barnes & Kate Hudec