Tiny and Mikey take the Dinosaur Train to find the tiniest dinosaur of all in Jurassic China; Buddy, Tank, and their pals search for Ceratopsians, which have up to 15 horns.
After Shiny and Annie have a disagreement, Mom recalls a similar disagreement with her best friend when she was a kid. Then, Mom and Tilly return to their old neighborhood to explore the swamp where they used to play as kids!
The Conductor, Buddy and the kids find an intact theropod raptor skeleton, which the team at Troodon Academy says is a new Jurassic dinosaur discovery; Buddy sets out to meet an example of their discovery, a theropod the group named Buddysaurus.
