All 98 episodes from the animated series! 'Til all are one! Four million years after crash-landing on an unfamiliar planet, sentient robots with the ability to disguise themselves as common vehicles awaken on present-day Earth. Engaged in a crucial race to find a new energy source for their home planet of Cybertron, Optimus Prime and the heroic Autobots must defend the innocent people of Earth against their archnemeses—Megatron and the power-hungry Decepticons!