written, produced and directed by Linda Garmon ; a Nova production by the WGBH/Boston Science Unit in association with BBC-TV, NDR International Hamburg and Nederlandse Omroepprogramma Stichting
a Yocha Dehe Wintun Nation production ; produced and directed by David Mueller & Lynn Salt ; co-producers, Tashina Banks, Takeo Koshikawa ; writer/interviews, Lynn Salt
Art21 presents ; a production of Art21, Inc. ; directors, Deborah Dickson, Stanley Nelson, Pamela Mason Wagner ; producers, Veronique Bernard, Ian Forster, Nick Ravich
ESPN Films presents a Laylow Films production ; produced & directed by Ezra Edelman ; produced by Caroline Waterlow ; producers, Tamara Rosenberg, Nina Krstic, Deirdre Fenton, Libby Geist, Erin Leyden, Connor Schell