|This article is about a/an episode in Kamen Rider Den-O.|
The Climax Goes On, No Matter What (クライマックスは続くよどこまでも Kuraimakkusu wa Tsuzuku yo Dokomademo) is the forty-ninth and final episode of Kamen Rider Den-O.
Ryotaro returns to the present to confront Kai and bring an end to his mad reign of terror, even if it means an end to all Imagin, including Momotaros and his allies!
By the time the DenLiner returns to the present, Kai uses his energy to destroy the city and links the present to his time. Ryotaro and Momotaros arrive at a building Kai is on, at which Ryotaro tells Momotaros his wish to fight alongside him to the very end. While Momotaros, along with Yuto and Deneb, fight off the Imagin army, Den-O confronts Kai and the Death Imagin. Kai unleashes his timepulse surge, turning the entire area into ruins, at which point Ryutaros arrives to try to save Ryotaro.
Kai celebrates his apparent victory, but the devastation only wiped out the area they were fighting in. Ryotaro then reveals his missing memory, the one responsible for Kai's failure: the child of Airi and Sakurai and the true key to the Junction Point: Kohana! Furious, Kai now seeks to destroy time altogether. Deneb presents the last Zerono card to Yuto, telling him the future is his to rewrite. Naomi arrives with the DenLiner, bringing Urataros, Kintaros, and Sieg to the present time to join Ryotaro and company. Everyone fights off the Imagin army, and the battle ends when Den-O Sword Form's final attack destroys the Death Imagin.
Immediately after, Kai and all the Imagin fade, much to Ryotaro and Yuto's dismay for the Tarōs, Sieg and Deneb respectively. However, the Tarōs, Sieg, and Deneb have not disappeared. As Owner explains to the Stationmaster that memories are time, Ryotaro and Yuto's memories about their journey with their magin friends support their existence. Back at the hospital, Sakurai fades out of existence after watching over Airi, who believes she will meet him again in the future someday.
Back at the DenLiner, Ryotaro returns the Rider Pass to Owner, giving his goodbyes and thanks to everyone. During Ryotaro's trip back to the Milk Dipper, the ZeroLiner and DenLiner pass by him. Everyone says their goodbyes to each other, and Ryotaro says they will meet again in the future.
- Den-O: Liner Form, Gun Form, Axe Form, Rod Form, Sword Form
- Zeronos: Altair Form, Vega Form, Zero Form
- Ryotaro Nogami (野上 良太郎 Nogami Ryōtarō): Takeru Satoh (佐藤 健 Satō Takeru)
- Kohana (コハナ Kohana): Tamaki Matsumoto (松元 環季 Matsumoto Tamaki)
- Yuto Sakurai (桜井 侑斗 Sakurai Yūto): Yuichi Nakamura (中村 優一 Nakamura Yūichi)
- Naomi (ナオミ Naomi): Rina Akiyama (秋山 莉奈 Akiyama Rina)
- Airi Nogami (野上 愛理 Nogami Airi): Wakana Matsumoto (松本 若菜 Matsumoto Wakana)
- Seigi Ozaki (尾崎 正義 Ozaki Seigi): Akira Nagata (永田 彬 Nagata Akira)
- Issē Miura (三浦 イッセー Miura Issē): Ryo Ueno (上野 亮 Ueno Ryō)
- Kai (カイ Kai): Hideo Ishiguro (石黒 英雄 Ishiguro Hideo)
- Past Man (過去の男 Kako no Otoko): Tomonobu Okano (岡野 友信 Okano Tomonobu)
- Momotaros (モモタロス Momotarosu, Voice): Toshihiko Seki (関 俊彦 Seki Toshihiko)
- Urataros (ウラタロス Uratarosu, Voice): Kōji Yusa (遊佐 浩二 Yusa Kōji)
- Kintaros (キンタロス Kintarosu, Voice): Masaki Terasoma (てらそま まさき Terasoma Masaki)
- Ryutaros (リュウタロス Ryūtarosu, Voice): Kenichi Suzumura (鈴村 健一 Suzumura Ken'ichi)
- Deneb (デネブ Denebu, Voice): Hōchū Ōtsuka (大塚 芳忠 Ōtsuka Hōchū)
- Sieg (ジーク Jīku, Voice): Shin-ichiro Miki (三木 眞一郎 Miki Shin'ichirō)
- Owner/Opening Narration, Stationmaster (オーナー／オープニングナレーション、駅長 Ōnā/Ōpuningu Narēshon, Ekichō): Kenjirō Ishimaru (石丸 謙二郎 Ishimaru Kenjirō)
- Mole Imagin (モールイマジン Mōru Imajin, Voice): Daisuke Kirii (桐井 大介 Kirii Daisuke), Kōichi Sakaguchi (坂口 候一 Sakaguchi Kōichi), Akira Sasanuma (笹沼 尭羅 Sasanuma Akira)
- Death Imagin (デスイマジン Desu Imajin, Voice): Hiroshi Yanaka (家中 宏 Yanaka Hiroshi)
- Kamen Rider Den-O/Momotaros: Seiji Takaiwa (高岩 成二 Takaiwa Seiji)
- Urataros: Eitoku (永徳 Eitoku)
- Kintaros: Jirō Okamoto (岡元 次郎 Okamoto Jirō)
- Ryutaros: Toshihiro Ogura (おぐら としひろ Ogura Toshihiro)
- Kamen Rider Zeronos: Makoto Ito (伊藤 慎 Itō Makoto)
- Deneb: Yoshifumi Oshikawa (押川 善文 Oshikawa Yoshifumi)
- Sieg: Naoki Nagase (永瀬 尚希 Nagase Naoki)
- Mole Imagin: Jun Watanabe (渡辺 淳 Watanabe Jun), Norihito Itō (伊藤 教人 Itō Norihito), Shinichi Kaneda (金田 進一 Kaneda Shinichi)
- Death Imagin: Hidenaga Saito (斉藤 英長 Saitō Hidenaga)
- As part of Super Hero Time, this episode aired alongside Juken Sentai Gekiranger episode 46, Lesson 46: Gyawa-Gyawa Memories
- Viewership: 6.5%
- This episode's title is a pun on the Japanese title of an American folk song, I've Been Working on the Railroad (線路は続くよどこまでも Senro wa tsuzuku yo doko made mo).
Blu-ray Box 3 comes with 13 episodes.