A documentary that follows Dr. Penny Patterson's current scientific study of Koko, a gorilla who communicates through American Sign Language.

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Main Cast: Penny Patterson, Koko, Saul Kitchener, Carl Pribram, Roger Fouts

Director: Barbet Schroeder

Writer:

Editors: Denise de Casabianca, Dominique Auvray

Cinematographer: Néstor Almendros

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