Season 1
Episodes
1. Medals, Underwear, and a Mysterious Arm
2010-09-05
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.
2. Desire, Ice Pops, and Presents
2010-09-12
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.
3. A Cat, Evolution, and a Glutton
2010-09-19
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.
4. Doubt, a Picture Message, and a Helping Hand
2010-09-26
Ankh threatens to leave OOO for Kazari and the Greeed while investigating the evolution of humanity while Eiji tries to find more about Hina.
5. A Game of Tag, a Nest, and a Rich Girl
2010-10-03
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.
6. Fashion, a Contract, and the Strongest Combo
2010-10-10
Hina confronts Yamano's shopping addiction when her father goes bankrupt while Ankh confronts Kougami about his share deal of the Cell Medals.
7. A Lousy Husband, a Trap, and a Jackpot
2010-10-17
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.
8. Sabotage, Having No Greed, and Taking a Break
2010-10-24
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.
9. Drenched, the Past, and the Scorching Combo
2010-10-31
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.
10. A Fist, an Experiment, and a Super Bike
2010-11-07
As Maki observes the bomber, Kougami Biotech Laboratory technician Toru Tadano, Ankh scolds Eiji, who later discovers Maki's whereabouts.
11. A Traveler, a Swallowtail, and a Celebrity
2010-11-14
Eiji encounters an old friend and globetrotting blogger, Keisuke Tsukuba, who has come to Japan to find a publisher for his work.
12. An Eel, the World, and the Gravity Combo
2010-11-21
Following Goto's attack, the Ageha Yummy retreats again while Eiji learns of Goto's distate towards him.
13. Episode 13
2010-11-28
No overview available.
14. Episode 14
2010-12-05
No overview available.
15. Episode 15
2010-12-12
No overview available.
16. Episode 16
2010-12-19
No overview available.
17. Episode 17
2010-12-26
No overview available.
18. Episode 18
2011-01-02
No overview available.
19. Episode 19
2011-01-09
No overview available.
20. Episode 20
2011-01-16
No overview available.
21. Episode 21
2011-01-23
No overview available.
22. Episode 22
2011-01-30
No overview available.
23. Episode 23
2011-02-06
No overview available.
24. Episode 24
2011-02-13
No overview available.
25. Episode 25
2011-02-20
No overview available.
26. Episode 26
2011-02-27
No overview available.
27. Episode 27
2011-03-06
No overview available.
28. Episode 28
2011-03-13
No overview available.
29. Episode 29
2011-03-20
No overview available.
30. Episode 30
2011-03-27
No overview available.
31. Episode 31
2011-04-03
No overview available.
32. Episode 32
2011-04-10
No overview available.
33. Episode 33
2011-04-17
No overview available.
34. Episode 34
2011-04-24
No overview available.
35. Episode 35
2011-05-01
No overview available.
36. Episode 36
2011-05-08
No overview available.
37. Episode 37
2011-05-15
No overview available.
38. Episode 38
2011-05-22
No overview available.
39. Episode 39
2011-05-29
No overview available.
40. Episode 40
2011-06-05
No overview available.
41. Episode 41
2011-06-12
No overview available.
42. Episode 42
2011-06-19
No overview available.
43. Episode 43
2011-06-26
No overview available.
44. Episode 44
2011-07-03
No overview available.
45. Episode 45
2011-07-10
No overview available.
46. Episode 46
2011-07-17
No overview available.
47. Episode 47
2011-07-24
No overview available.
48. Episode 48
2011-07-31
No overview available.