The Core

Plot
Megatron constructs a drill to reach the center of the Earth and tap the energy there, despite Starscream's warnings that this will destroy the planet. The Autobots, meanwhile, have come up with a way to control Devastator. In their attack on the drill, however, Megatron activates a countermeasure. The conflicting signals cause Devastator to go berzerk; only by cooperating are the Autobots and Decepticons able to control him again. Devastator destroys the drill, and the earth is safe.