Original Airdate: October 29th, 1986
Series: The Transformers - Season 3
Episode #83
Summary: The Quintessons, still plotting to retake Cybertron from the Transformers they created, devise a plan to release an ancient horror on the planet. They feed the Decepticons false coordinates for the Autobots' new Power Core, tricking the Decepticons into unleashing a failed creation of the Quintessons. Freed from its stasis pod, the huge cyborg monster named the Dweller lumbers to the surface, draining the life force of any Autobot or Decepticon that stands in its way.