As American policemen in London, Bud and Lou meet up with Dr. Jekyll and Mr. Hyde.
Herman discovers he's the new lord of Munster Hall in England. The family sails to Britain, where they receive a tepid welcome from Lady Effigy and Freddie Munster, who throws tantrums because he wasn't named Lord Munster. An on-board romance had blossomed between Marilyn and Roger, but on land Marilyn discovers Roger's family holds a longstanding grudge against the Munsters.
A young boy trades the family cow for magic beans. Ascending the beanstalk with the butcher who sold him the beans, he faces the giant terrorizing his village.
