Transformers: The Headmasters

Six years after the decisive battle against Unicron, a group of rebellious Headmasters led by Weirdwolf join with Galvatron's Decepticons in an attack on Cybertron. The Headmasters, led by Cerebros, return to their home planet to aid in its defense. The situation soon gets worse when it is revealed that Vector Sigma, the super-computer at the planet's heart, is destabilizing, and Optimus Prime again sacrifices his life to save Cybertron. This proves to be only delaying the inevitable, however, as a bomb attack instigated by Scorponok turns Cybertron into a burnt-out, inhospitable husk.

Rodimus Prime departs to search for a new planet for the Transformers to live on, leaving Cerebros in command, operating from the planet Athenia. Meanwhile, Scorponok replaces Galvatron- who had vanished in the explosion- as Decepticon leader, constructing a personal Transtector and redubbing himself MegaZarak to battle Cerebros' own giant form, Fortress Maximus.

Initially, Takara, the Japanese producers of the Transformers toyline, imported the American Transformers cartoon series from 1984 to 1987. When the series came to an end with the three-part miniseries "The Rebirth" in 1987, however, Takara decided to continue the series themselves, declining to import The Rebirth and instead creating a full-length 35-episode spin-off series, Transformers: The Headmasters (two additional clips episodes were produced after the fact for direct-to-video release). Supplanting The Rebirth's position in Japanese continuity, The Headmasters occurred one year after The Return of Optimus Prime, introducing the title characters to the Transformers universe in a different way. Whereas in Western fiction, the Headmasters result from the merging of a Transformer with an organic alien being from the planet Nebulos, the Headmasters of the Japanese series are a group of small Cybertronians who departed the planet millions of years ago and crash-landed on the inhospitable planet Master. To survive its harsh climate, a select few Cybertronians constructed larger bodies called "Transtectors", to which they connected as the heads.