Headmasters starts with Galvatron leading a new batch of Decepticons to wage war on Cybertron, the Decepticon Headmasters. The Autobots are rescued by the arrival of the Autobot Headmasters, led by Fortress (Cerebros, the head of Fortress Maximus). It is revealed that Fortress left Cybertron millions of years ago in search of energy, and have finally managed to come home. He explains that the Headmasters are from a planet called Master; the human-sized robots who live there built themselves Transformers-sized bodies. They can then transform themselves into the heads of the robots, and have now joined the Autobots/Decepticons war.
The original Transformers featuring the heroic Optimus Prime leading the Autobots. Defend Earth against the villainous Megatron, and Decepticons. Awakening in 1985, after they crash land on pre-historic Earth following a bitter civil war on their home planet of Cybertron. The series originally ran for 3 seasons in both Japan and abroad and continued on for another 3 seasons and an OVA in Japan.