Five Faces of Darkness
Five Faces of Darkness is the five-part season premiere of the third season of the G1 animated series. It was a direct sequel to the events of the animated movie, though none of the celebrity voice actors returned to their roles.
These episodes are infamous for poor art and animation quality; but from a storytelling perspective they provide much information about ancient Transformer history, and either establish or reinforce in-character behavior for practically every member of the cast.
Galvatron returns to lead the Decepticons, and Rodimus Prime has a head-trip into the Matrix to learn the history of the Autobots. FFoD is the first appearance of Trypticon, who smashes the Ark, and Metroplex, who have a rumble (which is neither red nor blue). Also the first appearance of Sky Lynx, Predaking, the Skuxxoid, and the offensive Abdul Fakkadi.
