Episode Title:Five Faces of Darkness, Part 4.Episode Description:Galvatron returns to assume his leadership of the Decepticons once more. He meets the Quintessons, who offer him a deal he can't refuse. Meanwhile, Rodimus enters the Matrix, where he makes a discovery about what role the Quintessons played in the Transformers' creation on Cybertron eons ago. Now, the Quintessons' goal is to regain control of Cybertron and destroy every Transformer in the galaxy.