I had the creepiest dream last night about Power Rangers Dino Thunder o.O
Somehoe, they got sent back in time, which is a common plot at this point, and Red, Yellow and Blue were there, but this must have been just after White gained control of his powers, since he was on their side, along with Black. I honestly forget some of their names, so will just use the colours.
They're sent back to the age of the Dinosaurs, and... are stuck. That's it. There doesn't seem to be any plot device or way home or anything, just them surviving in a humid jungle, and coming to the realization that they'll never get home. During this time, they see a comet coming closer. Blue explains that its actually NOT heading for Earth... the tail is clearly visible, so the comet will not hit Earth.
White suddenly loses his control, the comet causing his Morpher to act up somehow, and he begins attacking them, screaming that things must be rewritten, that the world must bath in flames to be saved. Having no idea what he's on about, they severely wound him, destroying his Morpher.
The others start experiencing similar problems, their powers going haywire, but also draining... yes, draining. This comet drains more power as it passes. Why? Because the 'Dino Gems' supposedly came to Earth in the asteroid that wiped out the Dinosaurs, and it was the energy of the Dinosaurs that filled them and gave them the power that would later lead to powering the Rangers technology. Thats what they thought at least. The reality is... those gems did not come from the Asteroid. It came from them. Their own gems are waning, and the asteroid will pass, meaning that the Dinosaurs will live on and the world as they know it will not exist. Instead, Mesogog would have won without ever existing.
Realizing what he must do, Tommy, or Black, the mentor, attacks his students, knowing they'll try to stop him, mortally wounding them and tearing their Morphers from their arms, crushing them in his hand so he has all 5 of them in his fist. He apologizes to his 4 dying students, because this is how it must be, standing there with his fist glowing red, blue, yellow, white and black, with his Brachial Staff raised, pulling the asteroid towards Earth. It hits him directly, destroying them and starting the ice age, leaving the Dino Gems in the crater to slowly soak up the energy of the genocide.
65 million years later, Tommy rediscovers the Gems, and the whole cycle begins anew.