After Fred criticizes a novel about the future that Barney is reading, The Great Gazoo sends Fred, Barney, Betty, and Wilma into the 21st Century (Wilma and Betty will remember nothing when getting back). This happens during a four day weekend that Fred and Barney have off from work. Fred meets Mr. Slate’s 21st century descendant-and finds out he stills owns 21 centuries of interest on a $4.00 loan!
