When Mom takes Trek and Penelope to Marineland, Trek gets so excited he imagines what it would be like if there was a show with prehistoric marine reptiles!

While Penelope and her Mom bird watch, Trek tries to figure out whether the Giganotosaurus, the Microraptor or the Troodon was the better hunter.

While on a sightseeing tour of Niagara Falls with his Grandma, Trek finds a seemingly lost baby Spinosaurus.--- Before Grandma heads south for the winter, she and Trek create a comic book about three pterosaur babies.

Trek teaches a baby Plesiosaur how to swim across the pool and back to its Mom; Penelope gets stage fright before the school talent show.

While Trek waits for his loose tooth to fall out, he finds a baby dinosaur tooth in the house and decides to figure out which baby dino it belongs to so that it can get a visit from the Dino Tooth Fairy!

Trek goes to the beach with Mom and Grandma and is determined to figure out Dino Experiment 410, "How does the Deinosuchus get its food?" Luckily for Trek, he soon sees the Deinosuchus! Trek visits Bobby and his father at Mr. Caparaz's work - a robotics laboratory. Trek spots a Dromaeosaurus guarding its nest outside. Trek sees one of the Dromy's eggs get stolen and enlists the help of multiple robots to return the egg to its nest!

It's Friendship Day and Trek discovers an Amargasaurus showing off for another Amargasaurus. Trek wants to figure out what they're doing. With the help of his friends, Trek figures out that the boy dino is trying to impress a girl dino. While Liam babysits Trek, Trek has to do some dino-sitting of his own when a baby Albertosaurus, baby Brachiosaurus and a baby Spinosaurus find their way inside. It's up to Trek to get them out of his house before they turn it into a huge mess!

When Penelope and her mother take Trek camping, they wake to find that something has messed up their campsite; when Trek goes fishing with Grandma, he discovers a baby Spinosaurus taking his fish.

When Trek accidentally throws Doug's favorite ball on to the roof, he tries to get a Dromaeosaurus to knock it down; Trek learns that the Therizinosaurus used its claws for defense, stripping leaves off trees and for digging up roots.

Trek tries to complete ``Dino Experiment 314'' while on a picnic with Liam, Penelope and Jordan; while making a video presentation for school, Trek and Hannah imagine that Doug is a prehistoric mammal.