Episode 16, "Exhumation! Battle Intelligence Kedora!"
*****SPOILERS*****
Synopsis: Upset by the revelation of his parentage, Kouji decides that he and Shiro will live at the Photon Power Labs, ignoring Tsubasa’s advice to him. Unable to sleep at night, he talks with Sayaka, but they’re interrupted by Mazinger Z, which has been put under control of Kedora, a strange creature Dr. Hell has sent. Kedora, as it happens, is the battle intelligence for the Mechanical Beasts, and transforms Mazinger into a giant demon. With Tsubasa’s help, Kouji is able to regain control and drive Kedora away. Dr. Hell is then confronted by someone who slumbered in the chamber where the Kedora were kept: Duke Gorgon.