|This article is about a/an episode in Kamen Rider Den-O.|
Climax Double Jump (クライマックスＷ（ダブル）ジャンプ Kuraimakkusu Daburu Janpu) is the twenty-fifth episode of Kamen Rider Den-O. This episode is the first part of a running tie-in arc to the Kamen Rider Den-O summer movie featuring the debut of Kamen Rider Gaoh
Ryotaro continues to try and gain the trust of Yuto, even as he's being dragged to an important climax!
While Ryotaro sleeps, Deneb chases down a Compsognathus around his room until Yuto arrives through the window to take Ryotaro onto the ZeroLiner to see the Climax Scene, with Deneb taking him aboard. A sleepy Ryotaro then finds himself seeing a Pteranodon and several Brachiosaurus until Yuto uses an aerosol of sleeping gas to knock Ryotaro out, with him seeing Urataros as he enters his body. By the time he wakes up, Ryotaro believes what had happened was only dream, too drowsy to notice the dinosaur tracks on his wall. At the Milk Dipper, he tells Hana about the dream, and when she confronts Urataros, he knows nothing, and the others say that she should ask Yuto. Ryotaro helps Airi mind and decorate the Milk Dipper for a group of students, serving Yuto while asking him about his dream, that Yuto also knows nothing about. Miura arrives to tell Airi that he injured himself, and she leaves Ryotaro to mind the shop, and after a fight with Deneb, Yuto agrees to help by decorating with the various star-shaped balloons Airi had inflated. Deneb stands outside to watch, unaware of a second Deneb briefly chasing a group of ninjas. When Deneb notices a shuriken thrown into the door, Hana takes him away to question him and learns that he knows nothing. When a customer arrives, both Yuto and Ryotaro notice that the man is an Imagin's contract holder. They follow him to a local hospice while Hana and Naomi watch over the Milk Dipper along with Ozaki. When the Spider Imagin attacks, intent on granting his contract holder's wish for his sister to see a starry sky, Yuto is on his own as Ryotaro had been abducted by Deneb into the timestream. Deneb appears to take the Spider Imagin away from the room as Yuto is forced to fight himself, defeating the Spider Imagin easily in Zeronos Vega Form. As for Ryotaro, he finds himself on the ZeroLiner with another Yuto, who takes him to see the "Climax Scene", witnessing a battle between Zeronos and another Kamen Rider as well as the Tarōs fighting several ninjas until a giant train erupts from a cave.
- Zeronos: Altair Form, Vega Form
- Gaoh: Gaoh Form
- Ryotaro Nogami (野上 良太郎 Nogami Ryōtarō): Takeru Satoh (佐藤 健 Satō Takeru)
- Hana (ハナ Hana): Yuriko Shiratori (白鳥 百合子 Shiratori Yuriko)
- 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)
- 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)
- Opening Narration (オープニングナレーション Ōpuningu Narēshon): Kenjirō Ishimaru (石丸 謙二郎 Ishimaru Kenjirō)
- Masashi Aoki (青木 雅史 Aoki Masashi): Kōhei Yamamoto (山本 康平 Yamamoto Kōhei)
- Mayu Aoki (青木 真由 Aoki Mayu): Sahoka Watanabe (渡邉 沙帆加 Watanabe Sahoka)
- Spider Imagin (スパイダーイマジン Supaidā Imajin, Voice): Chihiro Suzuki (鈴木 千尋 Suzuki Chihiro)
- 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)
- Spider Imagin: Norihito Itō (伊藤 教人 Itō Norihito)
- As part of Super Hero Time, this episode aired alongside Juken Sentai Gekiranger episode 21, Lesson 21: Biki-Biki-Biki-Biki! Kageki in Extreme Ki.
- Viewership: 6.5%
- This is the first episode where Ryotaro does not use Den-O at all.
- The title of this episode uses the letter "W" to represent "Double", which will likewise be used for a future Rider series
Blu-ray Box 2 comes with 18 episodes.