Power Rangers: Dino Thunder
A soccer player, a computer expert, a singer, an artist, and a teacher with a long history of such situations join forces to become Power Rangers and help save the Earth from the scheming of Mesogog, a dinosauric villain who wishes to eradicate all human life and return Earth to the age of dinosaurs.
In this season, Tommy Oliver, of Mighty Morphin Power Rangers to Power Rangers: Turbo fame, returns as a paleontology professor in Reefside, California. When he is assigned three detention students, Conner, Ethan, and Kira, they end up finding the Dino Gems, paving the way for them to become the Dino Rangers. Conner gains the power of the Tyrannozord, as well as super-speed; Ethan gains the power of the Tricerazord, as well as the ability to make his skin invulnerable; Kira gains the power of the Pterazord, as well as a sonic scream. Tommy (known often as Dr. O) himself joins the team as the Black Dino Ranger, and they are also later joined by Trent Fernandez as the White Dino Ranger, with the powers of invisibility and camouflage, respectively. Trent Mercer must deal with the inner struggle of good and evil, as he gained his powers from a raw Dino Gem in Mesogog's lab, with the powers originally intended to be Mesogog's. Mesogog is in fact, Trent's adopted father Anton Mercer, who in a faulty lab experiment began to mutate into Mesogog. Trent later sides with good and saves his father from the mutation. During the course of the series, the team adds to its arsenal Zords based on the Pachycephalosaurus, Parasaurolophus, Ankylosaurus, Dimetrodon, and Stegosaurus, the last of which combines with Trent's Zord, a Tupuxuara, to form the Dino Stegozord. Tommy pilots the Brachiosaurus Zord, the carrier for all the other Zords.
At the end of the series, Conner, Kira, Ethan, Tommy, and Trent finish off Mesogog with their raw Dino Gem power, but the gems are burned out in the process. Just before this, they are also forced to sacrifice all the Zords in their last battle with Zeltrax, one of Mesogog's strongest minions.