|This article is about a/an episode in Kamen Rider Decade.|
to be added
After defeating Knight, Decade is about to finish him off when Ryuki pleads with him not to deliver the final blow, as he feels Knight must answer for his crime by his hand. However, Abyss uses this time to make his move to take out all three Riders at once, forcing them to retreat with Ren refusing to answer Shinji as he leaves. After her brief encounter with Narutaki, Natsumi learns that Shinji and Tsukasa are convinced that Ren is Reiko's murderer, although Yusuke sees otherwise. Meanwhile, a wounded Ren battles Kamen Rider Odin and defeats him, emerging from Mirror World with Odin's Time Vent as Shinji and Yusuke find him. Learning that Ren obtained the card to save Reiko, Shinji uses the card to go back in time as Tsukasa holds Abyss off. Arriving seconds before Reiko's death, Shinji and Tsukasa manage to save Reiko with the latter cornering her true murderer, Kamata. Despite this, Kamata arrives and absorbs his past self before becoming Abyss and unleashing his monsters on Decade. After learning the truth behind Ren coming to the Atashi Journal and why he left, a relieved Shinji runs to Tsukasa's aid. Though the two manage to defeat Abyss together, they learn from Narutaki that Kamata is actually an Undead as the two depart. After he receives Shinji's photo of himself and Yusuke, Tsukasa and company enter the World of Blade.
- Card Used:
- Kamen Ride: Decade
- Attack Ride:
- Form Ride:
- Final Form Ride: Ryuki Dragreder
- Final Attack Ride: Ryuki
- Cards used:
- Time Vent
- Trick Vent, Final Vent
- Strike Vent, Final Vent
- Weapons/Powers summoned:
- Shadow Illusion, Hishozan
- Abyssmash, Abyss Dive, Abyssodon
- Tsukasa Kadoya (門矢 士 Kadoya Tsukasa): Masahiro Inoue (井上 正大 Inoue Masahiro)
- Yusuke Onodera (小野寺 ユウスケ Onodera Yūsuke): Ryouta Murai (村井 良大 Murai Ryōta)
- Natsumi Hikari (光 夏海 Hikari Natsumi): Kanna Mori (森 カンナ Mori Kanna)
- Eijiro Hikari (光 栄次郎 Hikari Eijirō): Renji Ishibashi (石橋 蓮司 Ishibashi Renji)
- Narutaki (鳴滝): Tatsuhito Okuda (奥田 達士 Okuda Tatsuhito)
- Kiva-la (キバーラ Kibāra, Voice): Miyuki Sawashiro (沢城 みゆき Sawashiro Miyuki)
- Decadriver Voice (ディケイドライバー音声 Dikeidoraibā Onsei): Mark Okita (マーク・大喜多 Māku Ōkita)
- Narration (ナレーション Narēshon): Eiichiro Suzuki (鈴木 英一郎 Suzuki Eiichirō)
- Shinji Tatsumi (辰巳 シンジ Tatsumi Shinji): Momosuke Mizutani (水谷 百輔 Mizutani Momosuke)
- Ren Haguro (羽黒 レン Haguro Ren): Eiki Kitamura (北村 栄基 Kitamura Eiki)
- Reiko Momoi (桃井 玲子 Momoi Reiko): Sae Takahashi (高橋 佐衣 Takahashi Sae)
- Kamata (鎌田): Masato Irie (入江 雅人 Irie Masato)
- Guard: Taketora Morita (森田 猛虎 Morita Taketora)
- As part of Super Hero Time, this episode aired alongside Samurai Sentai Shinkenger episode 4, Act 4: Nightly Tears of Sympathy.
- Viewership: 7.3%
- Decade regains Ryuki's power.
Blu-ray Box comes with all 31 episodes.