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 Hell sends him a "surprise" in the form of the mechanical life form Kedora, an organism originally made for the Mycenaeans to control their Machine Beasts.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.
Ayumi Fujimura
Shiro Kabuto
Kenji Akabane
Kouji Kabuto
Kazuhiko Kishino
Dr. Hell (voice)
Atsushi Imaruoka
Ankokuji Keiji
Fumihiro Awano
Tetsuya Tsurugi
Hiroshi Naka
Yanosuke Yumi
Kaori Yamagata
Baron Ashura
Kenji Utsumi
Emperor of Darkness
Masaaki Yajima
Zeus
Masayuki Katou
Yasu the Weasel
Minoru Inaba
Count Blocken
Satsuki Yukino
Gamia Q
Seiko Tomoe
Kikunosuke
Tessyo Genda
Cross
Youko Honda
Sayaka Yumi
Miyuki Ichijou
Tsubasa Nishikiori (voice)
Taimei Suzuki
Jūzō Kabuto
