The Autobots trace Decepticons to a mountain space monitoring centre where Constructicons and Soundwave build a giant transmitter with stolen trucks and radio equipment. Recognising the Autobots, Soundwave orders Constructicons to defend the transmitter while it completes its transmission to Cybertron. Constructicons merge into a giant form, a robot called Devastator... End of the original arc of the very first Transformers series!