The boys decide to do a science project on dinosaurs for the school science fair.

Wally and Heather panic when they hear their parents are planning an out- of-town move.

Wally's first day on the job at the zoo takes a turn for the worse when the self-serving Dr. Funt captures Denver for his new high-tech exhibit.

The kind-hearted Denver rescues one of the boy's arch rivals, Scott, winning his heart and killing his plans to expose Denver to the media in order to gain publicity and votes for the upcoming student election.

While visiting Jeremy's Uncle Eli on his Nevada ranch, Denver and the boys attend a local rodeo.