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A battle with the Decepticons leaves Optimus Prime damaged. Several Autobots journey to Cybertron to retrieve a vital part that will help repair him, but the Decepticons take advantage of the situation and launch an attack.
Episodes
1Transport to Oblivion 2Roll for It 3Divide and Conquer 4S.O.S. Dinobots 5The Ultimate Doom: Brainwash (1) 6The Ultimate Doom: Search (2) 7The Ultimate Doom: Revival (3) 8War of the Dinobots 9Countdown to Extinction 10Fire in the Sky 11Heavy Metal War 12Fire on the Mountain 13A Plague of Insecticons