Aria Noelle Curzon

Grandpa tells Littlefoot about their mythical hero called the Lone Dinosaur. Sarah gets two little lively cousins to take care of. Later, the kids accidentally chip the lucky Saurus Rock, and need to fix it before the bad luck hits.

When the dinosaur families get trapped in a valley by an ice storm, one family of "spike tail" dinosaurs volunteers to leave since they consume more food than the others. Meanwhile, the young dinos and a new adult dinosaur named Mr. Thicknose, head out to bring back their friend Spike, who has left his friends to be with members of his own species.