Episode 1 - Medals, Underwear, and a Mysterious Arm
September 5, 2010
• 23 minutes
A mysterious arm reawakens the Greeed from their slumber and decides to use Eiji Hino, a cheerful wanderer, as his means of getting back what he desires as Kamen Rider OOO.
Episode 2 - Desire, Ice Pops, and Presents
September 12, 2010
Ankh explains the Greeed and the purpose of the Medals to Eiji, even as the human desires to merely use his new power to fight for good instead of for selfish needs.
Episode 3 - A Cat, Evolution, and a Glutton
September 19, 2010
Ankh becomes troubled when Eiji prevents him from eliminating his possessed body's sister while another Greeed uses a man's gluttony to create more Medals.
Episode 4 - Doubt, a Picture Message, and a Helping Hand
September 26, 2010
Ankh threatens to leave OOO for Kazari and the Greeed while investigating the evolution of humanity while Eiji tries to find more about Hina.
Episode 5 - A Game of Tag, a Nest, and a Rich Girl
October 3, 2010
Kougami asks for a share of Eiji and Ankh's Medals, while Mezool decides to use Hina's shopaholic classmate to create a new Yummy.
Episode 6 - Fashion, a Contract, and the Strongest Combo
October 10, 2010
Hina confronts Yamano's shopping addiction when her father goes bankrupt while Ankh confronts Kougami about his share deal of the Cell Medals.
Episode 7 - A Lousy Husband, a Trap, and a Jackpot
October 17, 2010
Eiji tries to research a husband bullied by his wife that is being mocked by Gamel while Ankh follows a lead for a missing Core Medal.
Episode 8 - Sabotage, Having No Greed, and Taking a Break
October 24, 2010
Amidst Hino's failed attempts at stopping the Komoris' argument, Momoko takes the winning scratchcard and throws it into a nearby river. As Takeshi frantically searches for it, she reveals to Hino why Takeshi has become so greedy.
Episode 9 - Drenched, the Past, and the Scorching Combo
October 31, 2010
In flashbacks, Eiji fails to save a girl amidst a foreign civil war. In the present, Satonaka meets with Eiji to collect Kougami's fee until an explosion occurs outside.
Episode 10 - A Fist, an Experiment, and a Super Bike
November 7, 2010
As Maki observes the bomber, Kougami Biotech Laboratory technician Toru Tadano, Ankh scolds Eiji, who later discovers Maki's whereabouts.
Episode 11 - A Traveler, a Swallowtail, and a Celebrity
November 14, 2010
Eiji encounters an old friend and globetrotting blogger, Keisuke Tsukuba, who has come to Japan to find a publisher for his work.
Episode 12 - An Eel, the World, and the Gravity Combo
November 21, 2010
Following Goto's attack, the Ageha Yummy retreats again while Eiji learns of Goto's distate towards him.