Doc and the boys travel back to prehistoric times to test a new invention and Doc stops a meteor from colliding with Earth. They don't realize they changed history until they return home and find a civilization where dinosaurs rule!

It's Doc and Clara's anniversary and the kids get them tickets for a cruise, which takes place in 2091 and takes them into space. Unfortunately, Ziff Tannen sabotages the cruise ship.

Jules tries to grow a money tree to become popular at school, which leads to troubles with the media and the FBI.

Verne gets sick of his name after kids keep making fun of him and goes to great lengthes to get it changed, even going back to see his parents just before he's born.