Monkey Business

Grant plays Barnaby Fulton, an absent-minded scientist at a chemical firm on the hunt for an elixir of youth. When one of Fulton's mischievous laboratory chimpanzees dumps the latest test batch of the revitalizing solution into the company's water cooler, all hell doesn't exactly break loose, but the constraints on adult behaviour certainly get breached: anyone who takes a sip of the serum starts acting like their immature former self.