I'll Kill This Monster (この怪獣は俺が殺る Kono kaijū wa ore ga yaru) is the 22nd episode of Return of Ultraman.
Captain Kato was transferred to the Space Station. While MAT was waiting to welcome their new Captain Ibuki, a conflagration happened in Yumenoshia. On Go's decision, they extinguished the conflagration using extinguishing fluid. Right after the affair, they had a call from Ibuki warning them that extinguishing fluid shouldn't be used, as there was a plastic-eating monster underground!
- Hidek Goh (郷 秀樹 Gō Hideki): Jiro Dan (団 時朗 Dan Jirō)
- Takeshi Minami (南猛 Minami Takeshi): Shunsuke Ikeda (池田 駿介, Ikeda Shunsuke)
- Ippei Ueno (上野一平 Uneo Ippei): Mitsui Hatashi (三井恒 Hatashi Mitsui)
- Yuriko Oka (丘ユリ子, Oka Yuriko): Mika Katsuragi (桂木美加,Katauragi Mika)
- Captain Katsushiro Kato (加藤勝一郎) Nobuo Tsukamoto (塚本信夫, Tsukamoto Nobuo)
- Ryu Ibuki (伊吹 竜, Ibuki Ryu ):Negami Atsushi (根上 淳, Negami Atsushi )
- Fumio Kishida (岸田文夫 Kishida Fumo): Nishida Ken (西田健, Ken Nishida)
- Jiro Sakata (坂田 次郎 Sakata Jirō): Kawaguchi Hideki (川口英樹 Hideki Kawaguchi)
- Return of Ultraman Volume 6 features Episodes 21-24.
- This is the final appearance of Nobuo Tsukamoto as Captain Katsuhiro Kato, who would be replaced by Negami Atsushi who played Captain Ryu Ibuki for the rest of the series.