S1·E16 Exhumation! Battle Brain Kedora!

As Kouji continues to fight off Machine Beasts, Dr. Hell sends him a "surprise" in the form of the mechanical life form Kedora, an organism originally made for the Mycenaeans to control their Machine Beasts. As the Kedora takes control of Mazinger, Kouji attempts to stop the rampaging machine and destroy the Kedora itself. After getting help from Nishikiori, Kouji forces the Kedora out of Mazinger, and manages to destroy. Meanwhile, Dr. Hell, Baron Ashura and Viscount Pygman are met by the mysterious Archduke Gorgon.