|This article is about a/an episode in Kamen Rider V3.|
|You are Kamen Rider 4!!|
|Kamen Rider V3, Episode 51|
|Air date February 2, 1974|
|Written by Ikuro Suzuki|
|Directed by Issaku Uchida|
A Little Friendship
The Last Day of Destron
You are Kamen Rider 4!! (ライダー四号は君だ！！ Raidā Yongō wa Kimi da!!) is the fifty-first and penultimate episode of Kamen Rider V3.
Marshal Armor has developed a powerful Pluton Rocket that is more powerful than the H-Bomb and the Great Leader orders that it be aimed at Tokyo. Shiro and Joji become suspicious when a group of mountaineers are killed mysteriously in a remote valley. While investigating, they are attacked by mutant Crawganna who protects the Destron missile base. But, V3 and Riderman fail to stop Marshal Armor from starting the cataclysmic countdown.
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- Shiro Kazami (風見 志郎 Kazami Shirō): Hiroshi Miyauchi (宮内 洋 Miyauchi Hiroshi)
- Joji Yuki (結城 丈二 Yūki Jōji): Takehisa Yamaguchi (山口 豪久 Yamaguchi Takehisa)
- Tachibana Tobei (立花 藤兵衛 Tachibana Tōbee): Akiji Kobayashi (小林昭二 Kobayashi Akiji)
- Junko Tama (珠 純子 Tama Junko): Hizuru Ono (小野 ひずる Ono Hizuru)
- Shigeru Tama (珠 シゲル Tama Shigeru): Hideki Kawaguchi (川口 英樹 Kawaguchi Hideki)
- Marshal Yoroi (ヨロイ元帥 Yoroi Gensui)/Zariganna (ザリガーナ Zarigāna): Bunya Nakamura (中村 文弥 Nakamura Bunya)
- This episode aired on NET alongside episode 38 of Kikaider 01, The Mortal Device: The Bloody Battle of the Three Commas!.
- Mirroring the Double Riders' departure in episode 2, it features Riderman seemingly sacrificing himself to stop a bomb from destroying Tokyo, leaving V3 to take down Destron by himself in the following episode. Later in the year, however, Riderman would return along with V3 and the Double Riders to fight with Kamen Rider X in the film Five Riders vs. King Dark. Acknowledged by V3 as 'Kamen Rider #4', Riderman would go on to appear with his contemporaries in various subsequent crossovers to this day. A view of what happened to Riderman following his apparent fate here would be seen in the alternate continuity manga Kamen Rider Spirits.
- Kamen Rider V3 Volume 9 features episodes 48-52.
- The complete Kamen Rider V3 series was released in a boxset by Hawaii's Generation Kikaida, with English subtitles provided by JN Productions.