3x18 The Dweller in the Depths
First Aired: Oct. 30, 1986 on Syndicated
Summary: The Quintessons trick the Decepticons into releasing the dangerous Trans-Organics. One of them, the Dweller, begins taking control over Autobots and Decepticons alike.
Series Main Characters
Galvatron: I don't know what that thing is back in the tunnels, but even if it gets me as well, I'll die with the satisfaction that the universe will have two more Autobots to mourn!