|This article is about a/an episode in Kamen Rider X.|
The One-Eyed Monster's Human Review Operation! (一つ目怪人の人さらい作戦！ Hitotsume Kaijin no Hitosarai Sakusen!) is the fifth episode of Kamen Rider X. It introduced Tobee Tachibana, ally of the first four Kamen Riders, to the series, marking the instance Keisuke Jin learned of his predecessors who would appear to help him in his fight against G.O.D. later on.
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- Keisuke Jin (神 敬介 Jin Keisuke): Ryo Hayami (速水 亮 Hayami Ryō)
- Ryoko Mizuki, Kiriko Mizuki (水城 涼子, 水城 霧子 Mizuki Ryōko, Mizuki Kiriko): Naoko Miyama (美山 尚子 Miyama Naoko)
- Tobee Tachibana (立花 藤兵衛 Tachibana Tōbee): Akiji Kobayashi (小林 昭二 Kobayashi Akiji)
- General of G.O.D. (GOD総司令 Goddo Sō Shirei, Voice): Osamu Saka (阪 脩 Saka Osamu)
- Narrator (ナレーター Narētā): Shinji Nakae (中江 真司 Nakae Shinji)
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- This episode aired on NET alongside episode 44 of Kikaider 01, Bijinder's Beauty and Sorrow Separation.
- Cyclops would later appear as a revived kaijin in Five Riders vs. King Dark.
- This episode was broadcast on the same day the Kamen Rider X movie, a theatrical showing of episode 3, was released in theaters.
- Tachibana initally suspects Keisuke is a Destron cyborg, but quickly remembers that they were destroyed. The first four Kamen Riders #1, #2, V3 and Riderman, appear in flashbacks as Tachibana reminisces.
- All four Riders would appear with X in Five Riders vs. King Dark, however, only #2 and V3 would return to fight with X later on in the series itself.
- First appearance of Ridol Rope.
Kamen Rider X Volume 1 features episodes 1-11.