Monkey Business

In this 1952 American screwball comedy film, Cary Grant stars as Dr. Barnaby Fulton, an absent-minded research chemist working on a mysterious formula to turn back time and reverse aging. When one of his lab chimps accidentally spills the concoction into the water cooler, Fulton finds himself transformed into a spry young adult, complete with a taste for adventure and a renewed sense of youth - but only temporarily. His wife, Ginger Rogers, also gets in on the action, drinking from the same tainted water cooler to experience a second childhood, leading to a series of hilarious misunderstandings and mishaps that threaten their marriage and Fulton's sanity.