Five Faces of Darkness, Part 5

The Autobots and the Decepticons continue their massive struggle for Cybertron. There won't be any victors among any of them, though, if the Quintessons have their way. Only the most unlikely one of all can stop them. Meanwhile, Earth is suddenly no safer than Cybertron. Metroplex faces big trouble from the Constructions and Trypticon. Saving Metroplex and Earth requires Sky Lynx to get his teammate a transformation cog, but the Predacons intend to stop him.