Paramount Pictures Corporation

Jerry Lewis plays a timid, nearsighted University chemistry teacher who stumbles onto a magical potion in his lab. The mixture transforms the scholarly knucklehead into a suave and smooth-talking Romeo. His Jekyll and Hyde game works well enough until the concoction starts to wear off at the most embarrassing times.

Bumbling Jerome wants to be a doctor, but he is hopelessly squeamish, so he becomes an orderly at Whitestone Sanitarium. A one-man disaster area, Jerome triggers chaos every time he tried to lend a helping hand.