Kenneth Mars

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 heavy rains create a mysterious "new water", Littlefoot sets off to explore the Great Valley. He quickly becomes friends with Mo, a prank-playing dolphin-like creature who can't find his way back to the Big Water. Littlefoot and his pals come to the rescue and prove the value of courage, friendship, and diversity.

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.

In search of some adventure in their safe and peaceful valley, the five dinosaur friends make a hideaway. From there, they spot two thieves in action, stealing an egg from one of their broods. They chase them down and manage to recover the egg without its parents noticing, but in the process, accidentally create an opening into the valley, allowing two dreaded Sharptooths in. Everyone must fight them off together to preserve their peaceful way of life.

Petrie and his siblings get ready to fly for the Day of the Flyers, but Petrie is frustrated that he keeps flying out of formation. While practicing, he meets Guido, a Microraptor who does not know what he is, or where he belongs. With the help of Guido, Petrie learns how to be himself and stand out from the crowd.

After having found a magic locket which shows the kingdom of Atlantica, Melody decides to run away from home and find the truth behind it. Ariel eventually discovers that her daughter has run away after being told by Sebastian. Ariel must turn back into a mermaid to go into the sea once more to find her missing daughter. However, the crazy sister of Ursula, named Morgana intends to take control over the entire ocean. Ariel and her friends must stop Morgana from accomplishing the mission that Ursula failed and save Melody from her evil clutches.