First Born (1988)

Edward Forester is a genetic researcher, intent on breeding primate hybrids. But his experiments take a strange turn when he succeeds in breeding a human/gorilla hybrid. He hides the results of the experiment, adopting the child, and helps Gor to speak and blend into society. But Gor can't help being what he is, and tragedy and revelations are the ultimate result.

First Born has a runtime of 150 minutes.