Extras

    Video thumbnail: Koko - The Gorilla Who Talks Early Days with Koko

    Koko - The Gorilla Who Talks

    Early Days with Koko

    In this clip we see how Penny began to work with Koko.

    Early Days with Koko

    Video thumbnail: Koko - The Gorilla Who Talks The Move to Stanford

    Koko - The Gorilla Who Talks

    The Move to Stanford

    Penny moved Koko from San Francisco Zoo to Stanford, where their communication work began.

    The Move to Stanford

    Video thumbnail: Koko - The Gorilla Who Talks Facing Critics

    Koko - The Gorilla Who Talks

    Facing Critics

    Another ape language specialist became convinced that the whole field was flawed.

    Facing Critics

    Video thumbnail: Koko - The Gorilla Who Talks Koko's Kitten

    Koko - The Gorilla Who Talks

    Koko's Kitten

    Koko adopted a kitten called All Ball.

    Koko's Kitten

    Video thumbnail: Koko - The Gorilla Who Talks Preview

    Koko - The Gorilla Who Talks

    Preview

    The unique story of a life-long relationship between a scientist and Koko the gorilla.

    Preview

    Video thumbnail: Koko - The Gorilla Who Talks Battle for Koko

    Koko - The Gorilla Who Talks

    Battle for Koko

    Although Penny and Koko were now deeply bonded, Koko still belonged to San Francisco Zoo.

    Battle for Koko

    Video thumbnail: Koko - The Gorilla Who Talks Meet Koko

    Koko - The Gorilla Who Talks

    Meet Koko

    In this introduction to the film we meet Koko the world famous gorilla.

    Meet Koko