Kathleen Freeman

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.

Silent movies are giving way to talking pictures, and a hoofer-turned-matinee idol is caught in that bumpy transition, as well as his buddy, prospective ladylove, and shrewish co-star.