Terror of the Two Tsunami Monsters, Tokyo's Dalong Reel (二大怪獣の恐怖 東京大龍巻 Ni Dai Kaijū no Kyōfu, Tōkyō Ōtatsu Maki) is the 14th episode of Return of Ultraman and the conclusion to the Terror of the Tsunami Monsters arc. A theatrical version with episodes 13-14 combined came out as Return of Ultraman: Fear of the Tornado Monsters (帰ってきたウルトラマン竜巻怪獣の恐怖 Kaettekita Urutoraman Tatsumaki Kaijū no Kyōfu) on December 12, 1971 at the Toha Champion Festival along with other movies like Ghidorah, the Three-Headed Monster, renamed as Godzilla, Mothra, King Ghidorah: Earth's Greatest Battle and a shorter version of it, Inakappe Taishō's movie, The Adventures of Hutch the Honeybee, and The Little Match Girl.
After repulsing the giant tsunami created by Seamons and Seagorath, Ultraman was left with little energy and had to retreat. On the other hand, the result of the analysis of "The Song of Seamons" proved innocence of Captain Takamura, but he still faced difficulties returning to society. To repel Seamons and Seagorath from Tokyo, MAT had to develop a new weapon as soon as possible.
- Hideki Go (郷 秀樹 Gō Hideki ):Jiro Dan (団 時朗, Dan Jirō )
- Katsushiro Kato (加藤勝一郎 Katō Katsuichirō)Nobuo Tsukamoto (塚本信夫, Tsukamoto Nobuo)
- 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 )
- Aki Sakata (坂田アキ, Sakata Aki ):Rumi Sakakibara (榊原るみ, Sakakibara Rumi )
- 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 ) ):
- Captain Takamura (高村船長 Takamura Sencho): Akiji Kobayashi (小林昭二 Kobayashi Akiji)
- Yoko Takamura (高村陽子 Takamura Yōko): Keiko Nishiyama (西山恵子 Nishiyama Keiko)
- Goichiro Funayama (船山豪一郎 Gōichirō Funayama): Hiroshi Hasegawa (長谷川弘 Hasegawa Hiroshi)
- Kobacho Akagi (赤木工場長 Agaki Kōbachō): Hiroyuki Nishimoto (西本裕之 Nishimoto Hiroyuki)
- Self-Defense Forces commander (自衛隊指揮官 Jieitai Shikikan): Junichiro Mukai (向井淳一郎 Mukai Jun'ichirō)
- Ultraman Jack (ウルトラマンジャック, Urutoraman Jakku ): Eiichi Kikuchi (菊池英一, Kikuchi Eiichi )
- Seagorath (シーゴラス Shigorasu): Toya Takanobu (遠矢孝信 Takanobu Toya)
- Seamons (シーモンス Shimonsu): Moridaira (森平 Moridaira) (with Seagroath) & Toya Takanobu (遠矢孝信 Takanobu Toya) (alone scenes)
- Return of Ultraman Vol.4 Episodes 13-16.
- Akiji Kobayashi who was playing Captain Takamura previously played Toshio Muramatsu in the Original Ultraman Series. He was now currently playing one of the main characters of Kamen Rider, Tōbei Tachibana. Also, the fourteenth episode of Kamen Rider, Raid of the Demon Sabotegron aired a day after the airing of the Return of Ultraman episode.