Humans and chimpanzees share an estimated 98 per cent of genetic material, having branched off from one another two and a half million years ago. Genetically it is very likely that humans and chimpanzees could produce offspring. This fascinating special has unique access to the most famous purported human-chimpanzee hybrid called Oliver. He is 41 years old, walks upright on two legs, has a pronounced nose, human-like teeth and is eerily, always rejected by other chimpanzees. But is he really a chimp-human hybrid? Drawing on archive footage and interviews this film explores the taboo of hybridisation and the ethics of such a Frankenstein-science.