Sumdac, Bumblebee, the mayor of New Detroit, and police Captain Fanzone. To obtain it, he takes hostages including Prof. Meanwhile, Starscream arrives on Earth seeking the Allspark. The Autobots become the city's 'Cybernetic Superheroes', and put their skills to work by helping people. Prowl is severely injured and healed by this method.

Taking on new robot/vehicle modes, the Autobots battle and defeat the nanotech creature, and also meet Isaac's daughter Sari Sumdac, a spunky 8-year-old girl whose security key card is transformed by the Allspark into a transformable key capable of healing the Autobots' injuries. The Autobots are accidentally woken up from their stasis nap. Starscream betrays Megatron an explosion damages Megatron and he crashes on Earth along with the Autobot ship.ДЇifty earth years later, in the city of Detroit, a nanotech demonstration by Professor Isaac Sumdac results in a giant monster, which local police and SWAT are unable to combat. The crew is attacked by Decepticons including Megatron and Starscream, and are refused assistance from Cybertron. Matt Youngberg, Yutaka Kagawa, Minoru Yamaoka, and Makoto FuchigamiДЄ small repair crew, consisting of team leader Optimus Prime, hotshot Bumblebee, lumbering Bulkhead, ninja loner Prowl, and grumpy Cybertronian War veteran and medic Ratchet, find the Allspark among meteors when clearing a space bridge in an asteroid field. At the same time, the Autobots battle members of Megatron's old crew, including Starscream, Blackarachnia, Lugnut, and Blitzwing, while befriending some of the local humans, including Sari, her father, Professor Isaac Sumdac (who is tricked into helping Megatron) and machine-hating police officer Captain Fanzone. Meanwhile, the Autobots (Optimus, Bumblebee, Ratchet, Prowl, and Bulkhead) learn more about 22nd-century Earth from eight-year-old human Sari Sumdac, who has an encounter with the AllSpark that transforms her security key into a mystical Cybertronian artifact with vast powers.

The season's main theme following 'Transform and Roll Out' centered primarily around Megatron's return after his defeat during his first battle with Optimus Prime. The first season (consisting of sixteen episodes) began on December 26, 2007, with its three-part premiere 'Transform and Roll Out', and ended on April 5, 2008, with 'Megatron Rising, Part 2'.

List of transformers animated episodes