When Marty lies to Jennifer about going to a concert, Verne immediately wants to get an earring but Clara and Doc object. With Marty in tow, Verne stows away to the Caribbean in the year 1697 to become a pirate and get an earring.
Mr Wisdom, host of a children's scientific show and Verne's biggest hero, is broadcasting an episode from Hill Valley. Verne and Marty go to meet Mr Wisdom in person and they end up bringing him to Doc's lab.
Biff Tannen brags that he has an old, 1800s deed to the ranch of Jennifer Parker, and that he plans to evict her. Determined to help, Marty races back to the Wild West era, where he discovers that Tannen's outlaw ancestors swindled the Parkers out of their land. Unfortunately, the only way Marty can stop the scheme - is to saddle up with Tannen's gang.
Marty decides to help Verne to teach him how to dance like a pro and they go back in time to 1944 beguiled by a pair of dancing shoes Doc Brown invented in his college years.
Because Verne spends too much time at the arcade, His video game privileges are revoked by his parents. Jules Helps transmit Verne's favorite game to the family TV, but a glitch zaps the video characters into reality. Now Verne must test his skill against the real-life Demon Monstrux, who threatens to make everyone into his Brussels sprout-eating servant.
Tired of being an unpopular "brainiac," Jules grows himself a money tree. As the rich kid at school, Jules finds he has plenty of new-found "friends." But when news of the amazing tree gets out, it attracts the unwelcome attention of greedy minded Biff Tannen, as well as the suspicions of the FBI. Suddenly, Jules discovers the main thing money buys is trouble.
