On Reptilon, a twin planet to Earth, dinosaurs never became extinct, but evolved into two races of highly intelligent space travelers - the Dinosaucers and the Tyrannos. The desperate Dinosaucers have arrived on Earth seeking new energy sources. Tyrannos, however, share nothing and are determined to conquer Earth. It's up to four kids and the Dinosaucers to outmaneuver and outwit the Tyrannos.
The Tyrannos find a hidden valley of dinosaurs in South America and intend to enslave them using mind control collars.
The Secret Scouts teach the Dinosaucers how to play baseball at the Houston Astrodome. When the Tyrannos, in search of the world's largest diamond, show up to do battle, the Dinosaucers wind up using their new skills to defeat them.
The Dinosaucers and other Secret Scouts are preparing for Paul's surprise birthday party, when the Tyrannos sneak into the Dinosaucers' base to find out the secret to dinovolving.
Bonehead and Stego sneak out to visit a movie studio and get mistaken for costumed actors.
The Tyrannos fake news about a new energy source in New York in order to get Allo away from the Dinosaucers. Bronto Thunder goes to New York against Allo's orders.
Sara and Bonehead go to Hollywood to visit their favorite TV superhero, Mr. Hero. Unfortunately, the Tyrannos go to Hollywood too to eliminate Mr. Hero and get their claws on his weapons.
The Tyrannos steal a truckload of hamburgers, thinking they are gamma cells, to power their earthquake machine.
The Secret Scouts teach the Dinosaucers about camping and the outdoors. The Tyrannos take this opportunity to attack them, leaving the Dinosaucers to rely on their new skills in order to escape.
Teryx has invented a gadget that can manipulate the size of just about anything...including people. And when she, Bronto Thunder, Allo, Brian, and Sara wind up on the recieving end of the 'Shrink' setting, they've got to try and find a way to change themselves back while trying to ward off the Tyrannos!
David uses the Dinosaucers name and looks for his rock band, but is mistaken for the real thing by the Tyrannos.
Genghis Rex plans to recruit a giant monster to conquer Earth.
Paul and Sara teach the Dinosaucers how to have fun in winter.
The Secret Scouts show off their magic tricks, unaware that Quackpot plans to show off magic tricks of his own.
Quackpot is hit by Plesio's defector ray, causing him to join the Dinosaucers. Unfortunately, the Dinosaucers become the victims of Quackpot's practical jokes.
Sara helps Teryx admit her feelings for Ichy. At the same time, Genghis Rex plans on making Teryx his queen.
Sara and David bring their pets Missy and Charlie to Dinosaucer HQ, but the Fur Balls give them dino-sauce that turns them into half dog/cat dinosaurs! And if that wasn't enough, the two pets are spotted by the Tyrannos, who are looking for their own allies.
A tribe in the Amazon has begun misusing a Reptilon tool and the Dinosaucers and Tyrannos race to get it.
The Tyrannos attack a supply ship driven by Stego and Bonehead, who only have Ugh, Grunt and their relatives to help them.
While searching for sunken treasure, Plesio is photographed by a team of scientists. The Dinosaucers and Tyrannos rush to make sure the scientists are unsuccessful in capturing him.
Stego becomes a wrestler known as the Prehistoric Purge and Genghis Rex plans to kidnap the Secret Scouts at one of his matches.
The Tyrannos go to China to get their claws on the country's 'superpower'. A boy named Kai mistakes them for dragons.
The Tyrannos travel to Egypt and force an archeologist to help them find the tomb of Stego-Ra, the creator of dinovolving.
A nest of pteranadon eggs are discovered and the Dinosaucers and Secret Scouts rush to get them before the Tyrannos do! However, Terrible Dactyl wants them for his own reasons...
Bonehead's mother Bonehilda comes to Lavadome with a device that'll prevent the Tyrannos from intercepting their communications and Genghis Rex wants it. Meanwhile, Bonehead tries to make his mother proud by pretending to be commander of the Dinosaucers.
The Tyrannos head to the Bermuda Triangle to take a meteor that has the power to transport objects to Reptilon and the Dinosaucers team up with the meteor's whale guardians to stop them.
When Sara photographs the Dinosaucers, the pictures end up in the hands of a greedy reporter, who teams up with the Tyrannos.
David's cousin Francine causes alien invaders to appear on the TV sets of her hometown, causing a panic and bringing the Tyrannos who want to ally themselves with the non-existent aliens.
In honor of Fern Day, the Dinosaucers and Tyrannos call a 24-hour truce. The Secret Scouts take the Dinosaucers to the beach and the Tyrannos follow.
When a new dinosaur skull is found in Arizona, the Dinosaucers and Tyrannos venture there, both reenacting Reptilon's Old West days.
In order to learn more about dances, Teryx creates a device that temporarily turns her into a human.
While eavesdropping on a talk about volcanoes in Hawaii, Allo, Bronto Thunder, and Dimetro are captured by the Tyrannos, who are using a weather-controlling cannon. The Secret Scouts and Bonehead are likewise defeated, leaving it up to Stego to stop the Tyrannos.
The Dinosaucers and Tyrannos settle a dispute over a crater full of reptilite with a football game.
Plesio frees the fish in the aquarium the Secret Scouts work at and tries to get them to revolt against humanity.
The Tyrannos believe that they have a mind-control weapon made from perfume.
Teryx comes down with a mysterious illness and Allo goes to get the Dinosorceress to cure her. Unfortunately, Teryx is kidnapped by a greedy birdwatcher who plans to make her the find of the century.
Genghis Rex tricks Stego into taking Allo on a search for the Abominable Snowman so that he can steal it and add it to the Tyrannos.
It's April Fool's Day and Quackpot is running wild with practical jokes! It's up to the Secret Scouts to stop him.
When Bronto Thunder lies to his girlfriend Apatty Saurus about his accomplishments on Earth, he's forced to become the superhero Thunder-Lizard. In one part of the episode Bronto Thunder wears his swimming trunk shorts as he rides through a river.
When told to stay behind at Lavadome, Bonehead sneaks out to go to school with Ryan and Sara. Meanwhile, Genghis Rex plans to kidnap Bonehead and use him as leverage against Allo.
The Tyrannos sabotage a computer company with computer chips from Reptilon.
While scouting in Canada, Quackpot turns a lumberjack into a Bigfoot-like creature. The Dinosaucers try to help him while the Tyrannos try to capture him.
The Dinosaucers go to Japan and are roped into working in a monster movie. Meanwhile, the Tyrannos learn karate to fight the Dinosaucers.
Genghis Rex plans to recruit the Loch Ness Monster into the Tyrannos, but Plesio falls in love with her.
When Quackpot is kicked out of the Tyrannos, he plans to get revenge by pretending to be the Ancients of Reptilon.
Sara is hit by a tornado from a Tyranno weather machine and wakes up to find herself in a very Oz-like situation.
The Dinosaucers come down with an illness and the Secret Scouts have to keep the Tyrannos from finding out.
The Dinosaucers plan to go home for Merry Dinosaur Day but the Tyrannos spoil Bonehead's good cheer by telling him Stego-Claws doesn't exist. That night, Bonehead and David join Stego-Claws in trying to keep the Tyrannos from ruining Merry Dinosaur Day.
David, Allo, and Dimetro work to save David's grandparent's farm from the Tyrannos.
Ryan, Sara, Allo, and Teryx go to the circus where the Tyrannos are trying to kidnap a stilt-wearing clown named Clarence, whom they believe has a shrink ray.
After causing trouble at Lavadome, Ugh and Grunt run away, fall into a Tyranno trap and are taken to the Tar Pits.
Bronto Thunder, Tricero, Sara, and David go to Florida to find some dinosaur eggs in the possession of archeologist Dinosaur Dundy, but they've been stolen by a mutated crocodile.
The Maltese Pterodactyl is stolen and Tricero is called back to Reptilon to find it.
Allo tries to get the Tyrannos to compete in their form of Olympics as a way of making peace while Sara deals with a stuck-up rival at her own Olympics.
Dimetro follows Sara to school and befriends her trouble-making chemistry lab partner Glen.
Genghis Rex steals a perfume from the scientist who made it in order to make himself beautiful and take over the world. The Dinosaucers rush to stop him while Bonehead falls in love with the scientist's daughter.
The Secret Scouts are abducted by the Tyrannos, who sell them to a museum and it's up to Allo to rescue them.
Sabertooth tiger pirates come to Earth and the Dinosaucers and Tyrannos team up to stop them.
When the Secret Scouts are away at summer camp, the Tyrannos think they're at a boot camp to prepare them for war. Genghis Rex forms his own boot camp to combat them.
In order to go to the Reptile Fair on Reptilon, Bonehead leaves his little brother Numbskull in the care of Quackpot.
The Tyrannos mistake toy commercials as advertisements for weapons and kidnap David to make him tell them how they work.
The Tyrannos obtain a ray gun that brings dinosaur skeletons to life and the Dinosaucers seem unable to defeat them.
Sick and tired of always losing to the Dinosaucers, the Tyrannos decide to face them in court.
The Tyrannos go back to Reptilon to return to their old jobs and Allo, Teryx, and Bronto Thunder follow to see if they really are. But will the three Dinosaucers decide to stay on Reptilon?
The Tyrannos need a new energy source and believe that Paul's science fair project is what they're looking for. They turn Styraco into a human to steal it.