Mystery! Homicide Beetle Incident (奇怪！殺人甲虫事件 Kikai! Satsujin Kabutomushi jiken) is the twenty-sixth episode of Return of Ultraman.
A space insect that was mixed in a meteorite made its arrival to Earth. Days later, incidents of human disappearing happened in the city. MAT started their investigation believing the crime was made by a laser gun, but the real criminal was the stag beetle that's popular among the kids! Suddenly, the stag beetle became large and turn into monster Nokogirin.
- 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 )
- Ken Sakata (坂田健, Ken Sakata ):Shin Kishida (岸田森, Kishida Shin )
- Jiro Sakata (坂田 次郎, Sakata Jirō ):Kawaguchi Hideki (川口英樹, Hideki Kawaguchi )
- Narrator (ナレーター, NaretaAkira Nagoya (名古屋章, Nagoya Akira ) ):
- Return of Ultraman Volume 7 features episodes 25-28.