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.

The 'Classic in the Jurassic' games are back, and this time, it's the Ultimate Smackdown. Mr. Conductor explains the "wrestling" match-ups from the three Time Periods are: T. Rex vs. Triceratops, Allosaurus vs. Stegosaurus and, Zupaysaurus vs. Riojasaurus (dinos new to the Pteranodon clan.) Fears that competitors may get injured are allayed by the explanation of how the 'Smackdown' works - the best choreographed and most entertaining show wins. Morris Stegosaurus beats Alvin Allosaurus. When Ziggy Zupaysaurus goes up against Renaldo Riojasaurus, Mr. Conductor explains that Riojasaurus may be smaller, but has a powerful tail and speed on his side. Then Boris the T. Rex loses to Trevor Triceratops. Tank and Buddy are thrilled -what a face-off. Once the judges tally the results, Team Cretaceous is declared the winner, and the fans love it.

Buddy's Theropod Club meets with other dinosaurs that walk on two legs, eat meat, and have three toed feet.

Our kids ride the Dinosaur Train from one end of the line to the other, through all three Time Periods -- from the Cretaceous, through the Jurassic, to the Triassic.

When Mr. Pteranodon and Larry go out to the Big Pond to find some red platanoids for the Winter Solstice Celebration, they accidentally miss the last train home. Will Larry and Mr. Pteranodon stop bickering long enough to figure out a way home, or will they get stranded in the middle of nowhere and miss the family Winter Solstice Celebration?

"What's at the Center of the Earth? Layers!" The Conductor takes the Pteranodon family on a very special journey on a new invention - the Drill Engine Train - in search of the perfect spot for a new Underground Dinosaur Train Station. Don is THRILLED to be venturing into the BIGGEST HOLE THE EARTH HAS EVER KNOWN. Shiny is nervous to be underground, until they meet a new friend (a Mesozoic Mole named NATASHA NECROLESTES), who teaches them all about the different layers of the Earth. "What's at the Center of the Earth? Fossils!" As the Pteranodon Family continues their journey underground, Don accidentally breaks Buddy's trilobite fossil (the oldest fossil in his collection!) When the search for another trilobite fossil turns up empty, their new friend Natasha Necrolestes takes them to Fossil Alley, where the kids learn that the older the fossil, the deeper underground it is.

"What's at the Center of the Earth? Troglobites!" The Drill Engine Train burrows into an underground limestone cave, where the Pteranodon Family meets some strange creatures without eyes called "troglobites." In a contest to see who would make the best troglobite, Buddy, Tiny, Shiny, and Don participate in a treasure hunt - with their eyes closed. The kids have to rely on their other senses (with some guidance from the actual troglobites) to navigate the cave and find the prize. "What's At the Center of the Earth? Minerals!" While digging even further underground, the drill bit on the Drill Engine Train breaks. The Pterandon Family find themselves in the Cave of Giant Crystals, where they learn all about rocks and crystals (what they are, how they're different, how they form). In order to get back home, the Pteranodon Family has to fix the drill bit by finding a mineral harder than the mineral that broke the bit in the first place.

Junior Conductors Academy: Part 1- The kids are all excited! Why? Because they're off to Junior Conductor's Academy in Laramidia, to try to become Junior Conductors First Class./Junior Conductors Academy: Part 2- Now that Buddy and Dennis are friends, they have to work together (with the other kids) in order to pass a series of tests.

As the Pteranodon kids play in their family nest, Buddy stares at a sky full of clouds and asks the group, "What are clouds?" Mr. Pteranodon and his neighbor, Mr. Lambeosaurus have different opinions. As they all get on the Dinosaur Train, they consider whether clouds are made of water or whether they're just made of fluff. Tiny knows who would have the facts -- Mr. Conductor. He explains that clouds are made of billions of tiny drops of water that are so light they float in the air. He also takes the group to a stop at Cloudy Point Station where the kids play a cloud-spotting game, identifying three types of clouds they learned about: cirrus, stratus, and cumulus. In the end, a rainstorm certainly proves that clouds are made of water.