Seasons & episodes
S20 · E36Beyond R/Leave All Behind 2010-05-23 · 25 min
Terui must master the Trial Memory in order to save Nagi from Shinkuro, who has made his move with Saeko for Ryuube’s downfall.
S20 · E37Visitor X/The Bridge of Promises 2010-05-30 · 25 min
Shotaro is hired to find a mysterious man’s family, while Philip is confronted by Wakana about her position in the Museum with her sister gone.
S20 · E38Visitor X/In the Name of the Museum 2010-06-06 · 25 min
As Terui tries to gain more information regarding Yamashiro’s knowledge of the Museum, Philip contemplates leaving Fuuto forever with Wakana.
S20 · E39The Likelihood of G/Bad Cinema Paradise 2010-06-20 · 25 min
Shotaro is brought in to help a movie-theater worker who has unwittingly become the star of an epic others are forced to watch.
S20 · E40The Likelihood of G/I Can’t Forgive You 2010-06-27 · 25 min
As Akiko desperately tries to complete Tooru’s movie, the insular director is targeted by Wakana to allow her access to the full potential of her Dopant power.
S20 · E41J’s Labyrinth/A Bizarre Villainess 2010-07-04 · 25 min
Jinno asks Shotaro to help him find a cold-hearted, diamond-obsessed woman who set him up for arrest.
S20 · E42J’s Labyrinth/A Damaged Diamond 2010-07-11 · 25 min
Shotaro fights to save Rui from destroying herself, while Philip tries to figure out how to outsmart Wakana in gaining his library research.
S20 · E43The O Cycle/Elderly Detective 2010-07-18 · 25 min
Shotaro and Terui are asked by a mother to save her daughter, who has been turned old to satisfy a grudge hit as Shroud approaches Phillip and Terui, wanting them to become Kamen Rider Double Cyclone Accel Xtreme.
S20 · E44The O Cycle/Shroud’s Confession 2010-07-25 · 25 min
Terui tries to decipher the truth regarding Shroud and her intentions as she tries to force him and Philip to join together into the ultimate Double to defeat Ryubee. Meanwhile, an agent of Foundation X takes possession of the new Gaia Memories…
S20 · E45What K Demands/The Devil’s Tail 2010-08-01 · 25 min
A request from a worker at the Fuuto museum forces Shotaro to find an artifact required by Ryuube for his final master plan.
S20 · E46What K Demands/The Last Supper 2010-08-08 · 25 min
With Shotaro gripped by fear and Terui injured, Philip is at the mercy of his father Ryuube, who prepares to use his son and Wakana to bring about Gaia Impact.
S20 · E47The Remaining U/Phillip’s Case 2010-08-15 · 25 min
Philip chooses to ask Shotaro to help him find Wakana, so he could see her one last time, as she is being held by Kazu for Foundation X’s own plans.
S20 · E48The Remaining U/Partners Forever 2010-08-22 · 25 min
Shotaro and Philip must endure the ultimate hardships to stop Kazu from completing his own Gaia Impact in order to complete what could be their final case together.
S20 · E49Goodbye to E/A Bouquet of Justice For This City 2010-08-29 · 25 min
One year after Philip’s departure, Shotaro continues onward alone, but a case involving saving a boy’s sister from Dopant bullies brings forth a change for the better.
S21 · E1Medal, Underwear, Mysterious Arm 2010-09-05 · 25 min
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.
S21 · E2Greed, Ice Candy, Present 2010-09-12 · 25 min
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.
S21 · E3Cat, Evolution, A Glutton 2010-09-19 · 25 min
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.
S21 · E4Doubt, Photo E-mail, Saving Hand 2010-09-26 · 25 min
Ankh threatens to leave OOO for Kazari and the Greeed while investigating the evolution of humanity while Eiji tries to find more about Hina.
S21 · E5Game of Tag, Nest, Celebrity 2010-10-03 · 25 min
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.
S21 · E6Western Clothing, A Contract, Ultimate Combo 2010-10-10 · 25 min
Hina confronts Yamano's shopping addiction when her father goes bankrupt while Ankh confronts Kougami about his share deal of the Cell Medals.
S21 · E7Useless Husband, A Trap, Big Win 2010-10-17 · 25 min
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.
S21 · E8Slacking Off, Lack of Ambition, On a Break 2010-10-24 · 25 min
Eiji gets to the root of the Komoris' problem involving greed and loss of ambition while Ankh fights for survival after a failed confrontation with Uva.
S21 · E9Soaked, The Past, Scorching Hot Combo 2010-10-31 · 25 min
A serial bomber tied to a nest of Yummies leads to Eiji to reveal his past to Hina and forces him to encounter a strange man he believes is Mezool's victim.
S21 · E10Fist, An Experiment, Super Bike 2010-11-14 · 25 min
Eiji must figure the means of stopping the mad bomber and his Yummies to prevent any more lost lives, even with Maki observing the creation of his worker's monsters.