The Transformers (1984)

S3E8 Dark Awakening

While fleeing from Galvatron, Spike, Daniel, and a group of Autobots take refuge in a mausoleum, where they unexpectedly discover that Optimus Prime is alive. This revelation should spark immense joy among the Autobots. However, their excitement is short-lived as they realize that Optimus is actually under the control of the Quintessons, who are manipulating him as part of a scheme to turn him against his own allies.