Professor Kapp has invented a really real time machine, and, together with Gumby, Pokey, and Denali, he goes for a merry trip to Egypt, 2001 B.C., where he and Gumby are instantly enslaved. They telephone Prickle, who's still in the present, and have him bring them back, but he has some sort of problem with figuring out a simple keypad, so he keeps sending them to the wrong year. The traveling clay figures visit roughly a half-dozen popular historical events, completely screwing up the time line, before Prickle figures it out and brings them back to 1988.