In this comedy classic, a chimpanzee gets loose in Dr. Barnaby Fulton's (Cary Grant) lab and accidentally completes the youth formula Fulton has been working on. The industrious chimp also dumps the potion into the office water cooler - which becomes clear only when Fulton's staff mysteriously grows younger and younger. The chemistry really explodes when his voluptuous secretary (Monroe) gets a taste of the potion.