Very powerful movie with its heartbreaking story which will expose lots of abuse of Columbia University authorities... actually when I think about this experiment, to me the main reason for conducting it, and Nim becoming a research subject, was that the professor Herbert Terrace from Columbia University in New York can get laid! Through the documentary we witnessed that he finished in bed with almost every person involved... except Nim himself! Why would a linguist start an experiment in which his only real involvement is to give interviews and pose with the chimpanzee and the team, and keep it going without even having a real data keeping?
Nim's tale resembles the shape of a serialized narrative - he is sadly passed from one caretaker to the next, each one mostly well-intentioned and loving but also misguided and inevitably self-serving (as the professor himself)! Sad chapters of Nim's life are following and those chapters one by one become more astounding, confounding, and compelling. Yes, Nim acquires some communication skills, but he is never able to speak for himself! And all others just fail to speak for him!
Exploitation of Nim for human gain was appalling, yet there are important aspects which Marsh leaves unexplored, and that was the only negative remark about the movie. At the end, at least, we all agree that Nim was taken advantage of in the exercise of shabby science, and things like that should never happen!