Há um ano (2008), o detetive particular Sokichi Narumi e seu discípulo Shotaro Hidari resgatam Philip, um menino que estava sendo mantido em cativeiro por uma misteriosa organização. Durante a fuga, Sokichi foi abatido por uma bala de um perseguidor, e enquanto os dois restantes estavam em uma situação desesperadora, o garoto entregou a Shotaro uma máquina misteriosa e disse a ele: "Você tem coragem de andar com o diabo?" E no outono de 2009. Em Fuuto, a cidade dos ventos, onde há moinhos de vento por toda parte, Akiko Narumi, filha de Sokichi, é enviada do escritório para Shotaro e Philip, que sucedem Sokichi no ramo de detetives, pedindo-lhes para sair. Enquanto segue Shotaro, Akiko descobre a existência de um dopant misterioso que causa incidentes misteriosos em Fuuto. E ela estará profundamente envolvida na batalha de Kamen Rider W, o guerreiro que protege Fuuto, a fusão de Shotaro e Philip.
Episódios
1. Investigação Dupla / Dois Detetives em Um
6 de set. de 2009 25m 8.0Akiko Narumi arrives in Futo to be the landlord of the "hard-boiled" detective Shotaro Hidari, who finds himself involved in a case involving a former female love and a Dopant on the attack.
2. Investigação Dupla / Aquele que Faz a Cidade Chorar
13 de set. de 2009 25m 7.0After his missing target is killed by another Dopant, Shotaro works with his partner Philip to figure out the truth regarding the killer while being dogged by Akiko and her strange sightings.
3. Não Toque no Dinheiro / Como Ir ao Paraíso
20 de set. de 2009 25m 5.0Shotaro is hired to save a girl from a legendary casino who offers ultimate riches for victory… and ultimate penalty for loss.
4. Não Toque no Dinheiro / Apostando no Coringa
27 de set. de 2009 25mTracking down the legendary casino, Shotaro must defeat it’s Dopant owner as Philip deals with a crisis hindering his mental abilities.
5. Garota... A / Papai é um Kamen Rider
4 de out. de 2009 25mTracking down the legendary casino, Shotaro must defeat it’s Dopant owner as Philip deals with a crisis hindering his mental abilities.
6. Garota... A / O Preço da Mentira
11 de out. de 2009 25mShotaro debates the cost of keeping up Asuka’s belief Double is her father as Museum steps up their motive in protecting their Gaia Memory factory.
7. Procurando pelo C / Philip não pode com isso!
18 de out. de 2009 25mPhilip chases after a street dancer key to a locked memory, while Shotaro pursues a cockroach avenger taking out hired victims.
8. Episódio 8
25 de out. de 2009 25mAs several of Double’s Gaia Memories are taken by the Cockroach Dopant, Shotaro tries to find his true identity while Philip tries to reunite the dance partners for their legendary move.
9. Episódio 9
8 de nov. de 2009 25mAkiko gets a job as a maid for the Sonozaki family in order to investigate a Dopant abducting pastry chefs.
10. Episódio 10
15 de nov. de 2009 25mShotaro gets embroiled deeper in the Sonozakis connection to the Dopants as Akiko attempts to find the criminal behind the patisserie abductions.
11. Episódio 11
22 de nov. de 2009 25mShotaro decides to help an underworld gang after a member is killed by a Dopant-possessed car.
12. Episódio 12
29 de nov. de 2009 25mWhen the search for the Virus Dopant takes an unexpected turn, Shotaro and Philip must work to find the true controller and the reason behind their grudge.
13. Episódio 13
6 de dez. de 2009 25mShotaro and Philip investigate a Dopant stalker causing chaos in order to impress Wakana.
14. Episódio 14
13 de dez. de 2009 25mAs Shotaro continues to try and lure out Wakana’s violent stalker, Philip continues to get unusually close to the radio-broadcasting Sonozaki.
15. Episódio 15
20 de dez. de 2009 25mA suspicious woman hires Shotaro to find a Dopant who is running amuck while taking the name “Kamen Rider” as his own.
16. Episódio 16
27 de dez. de 2009 25mDiscovering a horrible secret from Saeko and seeing his partners captured by Arms Dopant, Philip must figure a way to save them even if using the unstable Fang Memory.
17. Episódio 17
10 de jan. de 2010 25mWhen Shotaro is hired to find the daughter of his barber, he discovers horrible new developments regarding the Gaia Memories.
18. Episódio 18
17 de jan. de 2010 25mAs Shotaro and Philip discover the truth regarding the teens using the Bird Memory, Kirihiko discovers the truth behind Museum and his usage by the Sonozaki family.
19. Episódio 19
24 de jan. de 2010 25mThe new leader of Fuuto Police’s Dopant investigation division uses Shotaro to track down a Dopant attacking victims with ice.
20. Episódio 20
31 de jan. de 2010 25mAs Ryu’s intensity and Kamen Rider Accel powers threaten to harm innocents, Shotaro and Philip must discover the reason behind his anger while putting a stop to the ice-powered Dopant.
21. Episódio 21
7 de fev. de 2010 25mMakura involves Shotaro in a case in rooting out a traitor within the Fuuto police leaking out information on the Gaia Memories.
22. Episódio 22
14 de fev. de 2010 25mAya tries to gain Shotaro and Ryu’s trust in using her Dopant power to be an asset, hiding her true intentions and desires of her situation.
23. Episódio 23
21 de fev. de 2010 25mA request from Queen & Elizabeth leads to an investigation of a terrible street performer mysteriously winning a popular singing competition.
24. Episódio 24
28 de fev. de 2010 25mWhile trying to figure a means to defeat the tricky Liar Dopant, Shotaro confronts Jimmy about his confidence and trust in his female fan.
25. Episódio 25
7 de mar. de 2010 25mAkiko is asked by a little girl to find her lost doll, which has been terrorizing targets throughout Fuuto.
26. Episódio 26
14 de mar. de 2010 25mAs Horinouchi is taken by the bizarre Dr. Isaka for further usage, Akiko tries to decipher the meaning of the doll and the truth behind Horinouchi’s daughter.
27. Episódio 27
21 de mar. de 2010 25mA ditzy female magician who turns invisible asks Shotaro to find the seller of her Gaia Memory, which ultimately leads Terui to the man who killed his family.
28. Episódio 28
28 de mar. de 2010 25mAkiko and Philip desperately try to stop Terui from taking immediate revenge on Shinkuro when he becomes key to saving Lily from her deadly Gaia Memory.
29. Episódio 29
4 de abr. de 2010 25mShotaro accepted a request from a girl fearing a Dopant who attacks it’s victims in their dreams which it can control.
30. Episódio 30
11 de abr. de 2010 25mAs Philip is taken by the Xtreme Memory to meet with Shroud, Shotaro continues to try and figure a way to discover the culprit behind Nightmare Dopant’s attacks.
31. Episódio 31
18 de abr. de 2010 25mA mob friend of Soukichi asks Shotaro to help him settle an old score and get back what he returned to Fuuto for.
32. Episódio 32
25 de abr. de 2010 25mWhile under pressure of being abandoned by Philip as his Double partner for not keeping up, Shotaro tries to decipher the truth behind Bitou’s framing.
33. Episódio 33
2 de mai. de 2010 25mShotaro decides to help a peculiar woman find her lost cat while Terui investigates people committing strange actions beyond their control.
34. Episódio 34
9 de mai. de 2010 25mShotaro fights to prevent Yukie from joining the Museum for the sake of herself and of the memory of her deceased brother Kirihiko.
35. Episódio 35
16 de mai. de 2010 25mAs Shotaro is asked to pursue a young teacher by her students, Terui also goes after her due to a remarkable similarity between her and his deceased sister.
36. Episódio 36
23 de mai. de 2010 25mTerui must master the Trial Memory in order to save Nagi from Shinkuro, who has made his move with Saeko for Ryuube’s downfall.
37. Episódio 37
30 de mai. de 2010 25mShotaro 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.
38. Episódio 38
6 de jun. de 2010 25mAs Terui tries to gain more information regarding Yamashiro’s knowledge of the Museum, Philip contemplates leaving Fuuto forever with Wakana.
39. Episódio 39
20 de jun. de 2010 25mShotaro is brought in to help a movie-theater worker who has unwittingly become the star of an epic others are forced to watch.
40. Episódio 40
27 de jun. de 2010 25mAs 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.
41. Episódio 41
4 de jul. de 2010 25m 10.0Jinno asks Shotaro to help him find a cold-hearted, diamond-obsessed woman who set him up for arrest.
42. Episódio 42
11 de jul. de 2010 25mShotaro fights to save Rui from destroying herself, while Philip tries to figure out how to outsmart Wakana in gaining his library research.
43. Episódio 43
18 de jul. de 2010 25mShotaro 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.
44. Episódio 44
25 de jul. de 2010 25mTerui 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…
45. Episódio 45
1 de ago. de 2010 25mA request from a worker at the Fuuto museum forces Shotaro to find an artifact required by Ryuube for his final master plan.
46. Episódio 46
8 de ago. de 2010 25mWith 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.
47. Episódio 47
15 de ago. de 2010 25mPhilip 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.
48. Episódio 48
22 de ago. de 2010 25mShotaro 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.
49. Episódio 49
29 de ago. de 2010 25mOne 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.