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 co-production of Visty/Brennan Productions and Thirteen/WNET in association with the Gorilla Foundation/koko.org ; written & produced by Bonnie Brennan & Robert Visty ; producers, Jill Clarke, Jessica Siegel