
Officer Mandora arrests the renegade robot Cracker and takes his Space Freighter to the Grey Planet Prison. Cracker traps her and releases all the prisoners. Mandora sends her bike Electra Charger to bring Lion-O to her aid. The "reformed" pickpocket, Quickpic, helps Lion-O rescue Mandora by pushing the Orbit Brake and bringing the planet to a halt. Lion-O is kidnapped by the captain and when the freighter is in deep space again, he is made to walk the plank. Mandora and Quickpic retrieve the lost Sword of Omens and pursue the freighter. They arrive just in time to catch Lion-O as he falls through infinity. Lion-O signals the Thundercats with the Sword's Eye to warn them of Cracker's arrival on Third Earth. The Thundercats trap Cracker and his robot crew in a steel net. Mandora and Quickpic set off to return them to the Prison Planet.
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