Assassinate Hideki Go! (郷秀樹を暗殺せよ! Go Hideki Ō Ansantsu seyo) is the 45th episode of Return of Ultraman.
In a battle with monster Robonez, Ultraman won but injured his left arm. Go was told to rest and canceled his trip, but the plane he was supposed to board exploded. Later, a girl named Erika Shiratori transferred to Jiro's class, and presented him with a pen. The pen, however, is a carefully disguised time bomb...
- Hideki Go (郷 秀樹 Gō Hideki ):Jiro Dan (団 時朗, Dan Jirō )
- Ryu Ibuki (伊吹 竜, Ibuki Ryu ):Negami Atsushi (根上 淳, Negami Atsushi )
- Takeshi Minami (南 猛 Minami Takeshi ):Shunsuke Ikeda (池田 駿介, Ikeda Shunsuke )
- Ippei Ueno (上野 一平, Uneo Ippei ):Hatashi Mitsushi (三井 恒, Mitsushi Hatashi )
- Yuriko Oka (丘 ユリ子, Oka Yuriko ):Mika Katsuragi (桂木美加,Katauragi Mika )
- Fumio Kishida (岸田文夫 Kishida Fumo ):Ken Nishida (西田健, Nishida Ken )
- Jiro Sakata (坂田 次郎, Sakata Jirō ):Kawaguchi Hideki (川口英樹, Hideki Kawaguchi )
- Rumiko Maruno (村野 ルミ子, Maruno Rumiko ):Iwasaki Kazuko ( 和子 岩崎, Kazuko Iwasaki )
- Alien Messie (メシエ星人, Meshie Seijin ): Isao Yatsu (谷津勲, Yatsu Isao )
- Narrator (ナレーター, NaretaAkira Nagoya (名古屋章, Nagoya Akira ) ):
- Alien Cugnus-61 Erika (白鳥座61番星人エリカ Shiratori za 61-ban Seijin Erika) Junko Kawasaki (川崎順子, Kawashi Junko )
- Robonez (First and only appearance)
- Alien Cygnus-61 (First and only appearance)
- Alien Messie (First and only appearance)
- Return of Ultraman Volume 12 features episodes 45-48.