Following the events in Transformers: The Movie, the Decepticons have fled and the Autobots are victorious under the command of a new leader, Rodimus Prime. In the midst of the celebrations, the Autobots are attacked, leaving the Decepticons the obvious suspects. Meanwhile, the mysterious Quintessons attempt to conceal a dark secret as old as Cybertron itself.
| Actor | Role |
|---|---|
 Peter CullenOptimus Prime | Optimus Prime |
 Frank WelkerGalvatron | Galvatron |
 Richard GautierRodimus Prime | Rodimus Prime |
 Jack AngelUltra Magnus | Ultra Magnus |
 Gregg BergerGrimlock | Grimlock |
 Susan BluArcee | Arcee |
 Neil RossSpringer | Springer |
 John StephensonKup | Kup |
 John Moschitta Jr.Blurr | Blurr |
 Ed GilbertBlitzwing | Blitzwing |