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Transformers: Robots in Disguise

The Predacons attack (a just-slightly futuristic) Earth and kidnap a famous scientist. The Autobots, who'd already established themselves in secret on Earth are ready for them and together with the scientist's son, Koji, fight to stop the Predacons from finding the ancient hidden secret they've come to Earth to claim. 2000 (Japan as "Transformers: Car Robots"), 2001 (North America as RiD). Studio Gallop. 39 episodes. 8/10