The Monster Is a Giant Shooting Star in Space (怪獣は宇宙の流れ星 Kaijū wa uchū no nagareboshi) is the 20th episode of Return of Ultraman.
Go was investigating the frequently occurred accidents of airplanes. The reason seemed to be overconcentration of the geomagnetic field in Kumazawa Dam. Monster Magnedon appeared near Kumazawa Dam, and was defeated by MAT. However, it was soon revived and MAT was asked to take the responsibility. To save MAT from dissolution, Go has to defeat the monster completely with his injured body.
- Hideki Go (郷 秀樹 Gō Hideki ): Jiro Dan (団 時朗, Dan Jirō )
- Kato Katsushiro (加藤 勝一郎, Kato Katushiro ): Nobuo Tsukamoto (塚本 信夫, Tsukamoto Nobuo )
- 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 )
- Aki Sakata (坂田アキ, Sakata Aki ): Rumi Sakakibara (榊原るみ, Sakakibara Rumi )
- Narrator (ナレーター, NaretaAkira Nagoya (名古屋章, Nagoya Akira ) ):
- Return of Ultraman Volume 5 Features Episodes 17-20.