Jack is a three-year-old chimpanzee who has been the subject of a long-term experiment by Dr. Kendall, a researcher who been teaching Jack to communicate through sign language. Jack scrambles onto the ice in the midst of practice for … Kevin Zegers, Jamie Renée Smith, Alexa Benette Fox, Lomax Study, Russell Ferrier, Jane Sowerby, Ingrid Tesch Added on Amazon Prime 2020-09-17.