a Nova/WGBH production ; produced by Matthew Barrett, John Rubin, and Sarah Holt ; written by John Rubin ; directed by John Rubin, Rushmore Denooyer, Serena Davies, and Sarah Holt
a Frontline co-production with RAINmedia, Inc. ; a production of WGBH/Boston ; written and produced by Martin Smith and Marcela Gaviria ; co-produced by Will Cohen
Apple Corps Ltd. ; a WingNut Films production ; directed by Peter Jackson ; producers, Paul McCartney, Ringo Starr, Yoko Ono Lennon, Olivia Harrison ; produced by Clare Olssen, Peter Jackson, Jonathan Clyde
series producer, Graeme Hart ; a production of McGee Media, Inkwell Films, Kunhardt Films and WETA Washington, D.C., in asociation with Nutopia Limited ; written by Henry Louis Gates, Jr. ; producer/directors, Mark Bates, Karen McGann and Virginia Quinn