A pop-science film, intended to combat fear of atomic energy by explaining how it works scientifically.

Snagglepuss adds a room to his house, hoping the rent he receives will finance a vacation trip to the South Seas. Lovely Lila, a Southern belle, becomes his new tenant. In no time, Snagglepuss finds himself moved into the spare room and Lila has the run of the house. When she demands new drapes, new decorating, and not one but two swimming pools, Snagglepuss rebels.

An Englishman (Leslie Howard) who has been studying painting in Paris for four years, is advised by his art teacher that his work is mediocre and second-rate, and that he lacks promise. So he returns to London, England to take up studies to become a medical doctor, but his older age and introspection make it difficult for him to keep up in his scholastic work. In England, he becomes infatuated - and then obsessed by a blonde, lower-class, slatternly and vulgar, Cockney-accented, illiterate tearoom waitress named Mildred Rogers (Bette Davis)