a Nova/WGBH, La Cinquième, Südwestrundfunk, Gedéon Programmes, Meridian, and NHK co-production ; produced for Nova by Providence Pictures, Inc. for WGBH/Boston ; written and directed by Liesl Clark
A Rosetta Pictures production for Nova/WGBH and Channel 4 ; WGBH Educational Foundation ; written and directed by Christopher Rawlence ; produced by Emma Crichton-Miller