List of Kamen Rider OOO episodes

This is a list of episodes of the 2010–2011 Kamen Rider Series Kamen Rider OOO. Each episode title consists of three objects featured in the episode.

Eiji Hino is working as a part-time security guard in the Kougami Art Museum, but he is unknowingly drugged by two thieves posing as fellow security guards who put sleeping pills in his juice. While in the middle of robbing the artifact chamber blind, a mass of coins form into an arm that breaks a seal on a mysterious sarcophagus releasing four monsters. The Kougami Foundation, owners of the museum, send their Ride Vendor 1st Squad motorcycle brigade to bomb the museum, intending to trap the monsters known as Greeed inside. However, the Greeed escape, and overpower the squad, while the Kougami Foundation's leader Kousei Kougami decorates a birthday cake, welcoming the Greeed into this world.

As Chiyoko and others gather supplies to make Valentine's Day chocolate, Shintaro notices a boy being pushed around by an older man after he refuses to pick up a can he threw. After Eiji gives the man his can, the boy's father arrives and his son, Takashi, expresses pride in him in not letting bad guys have their way before Chiyoko recognizes the father as Susumu Kanbayashi. After leaving, and after Takashi runs away from him after seeing his father refusing to come back home to him and his mom, Susumu is confronted by Uva who creates a Yummy that acts on the man's subconscious desire to show that crime does not pay and molts into the Grasshopper Yummy. Later at the Cous Coussier, while the others continue to prepare for Valentine's Day, Eiji is still worried at how Ankh was unable to regain his true form. Taking Ankh along with him on an errand, Eiji is unable to get any answers as Ankh senses the Yummy's presence. Upon seeing the Grasshopper Yummy going after a frighten woman, Eiji becomes Kamen Rider OOO with several Waste Yummy getting in the way. After transforming into Takauba to destroy the monster grunts, he watches the Grasshopper Yummy give the scared woman her purse before taking his leave. At the Cous Coussier, with Chiyoko tending to Susumu's wounds before he leaves off, Eiji and Ankh are confused as how the Yummy was acting heroic, but Ankh chides the Eiji for thinking a Yummy can truly be a hero. Later, as the Grasshopper Yummy resumes his attack on whomever Susumu sees as a bad guy, Shintaro trains to resist the Birth Buster's recoil before finding Takashi and tries to explain to him about not putting himself in danger before the boy runs off. That night, when the Grasshopper Yummy attacks a group of punks for causing noise pollution, Eiji arrives and becomes OOO to stop the monster's rampage. With no suitable Core Medals to counter the monster's speed, Ankh is forced to give OOO his Kujaku Medal to become Takajaba before the Grasshopper Yummy stops the escaping punks from nearly running Takashi over. By then, Date arrives and becomes Kamen Rider Birth, using the Caterpillar Leg and Shovel Arm to take some Cell Medals before Uva intervenes. With OOO arriving in time, the Kamen Riders fight Uva and the Grasshopper Yummy. But just as OOO prepares to use a Giga Scan to destroy the Grasshopper Yummy, Susumu stands in the line of fire. Seeing that his father unable to give up this new power to do good, Takashi follows suit in protecting him from the astonished Kamen Rider.

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