In the first episode, in which the time machine winds up in the year 1,000,000 B.C., a tribe of cave people select Ralph as their king for a day. But the gang wonders why the previous kings had such a short reign. The answer when revealed may lead to Ralph's doom unless Fonzie and the gang step in to help him.

The time machine is close to getting to the year 1957, but it overshoots by a century, causing it to wind up in the year 2057. Worse yet, Cupcake's magic caused it to go into space. The gang manages to get it to the moon where they learn of an alien plot to conquer Earth. Can the Fonz stop their invasion plans?

The time machine transports the gang to Ancient Iraq, where King Nebuchadnezzar II calls for some help to save his famous Hanging Gardens from an evil prince.

The time machine takes the gang to the age of pirates, where Edward Teach, a.k.a. Blackbeard, needs the gang's help to find a lost treasure.

The time machine teleports the gang to 1800s, where they help out famous outlaw Billy the Kid.

The gang's time machine takes them to the Ming Dynasty of China in 1371, where the Hongwu Emperor's actual throne is stolen, and Cupcake uses her magic to defeat an evil sorcerer to get it back.

Unknowingly aided by Count Dracula, the gang's time machine winds up back to their present time of 1957, but not in Milwaukee. They end up in Transylvania, where they meet the count at his castle and have to overcome various horrors in order to escape -- one of which has a scared boy Ralph turning into a savage werewolf.

While the gang is experiencing life in Massachusetts during the Salem witch trials in 1693, Cupcake is captured by a crazed witch hunter. Now the gang must save her.

The gang travels to Ancient Egypt, where they meet Cleopatra. Ralph falls in love with her, but Cupcake sets him straight because history says that Caesar and Cleopatra dated.

The gang's time machine transports them to a jungle in Peru, circa 1532, where they meet friendly Incas and save them from the wrath of Francisco Pizzaro.

In medieval Camelot, the gang comes to the aid of King Arthur and Merlin the Magician when the evil Black Knight imprisons Arthur and plots to take over his kingdom.

In 19th century France, Cupcake transports the gang inside Jules Verne's imagination.

In ancient Greece, the evil Medusa kidnaps Hercules, and the gang must save him.