Transformers Generation 1 Season 3 Episode 28 The Face of the Nijika

While battling Decepticon and Quintesson forces, the Autobots end up on an unknown alien world. There, they meet the natives of this world who have been imprisoned by the Quintessons for a long time. But when Perceptor goes missing, the other Autobots must find him before the Quintessons do and free the natives from their imprisonment.