Shotaro and Philip must endure the ultimate hardships in order to stop Kazu from completing his own Gaia Impact to complete what could be their final case together.

As Shotaro and Philip discover the truth regarding the teens using the Bird Memory, Kirihiko discovers the truth behind the Museum organisation.

While under pressure of being abandoned by Philip as his Double partner for not keeping up, Shotaro tries to decipher the truth behind Bito's framing.

Ryu tries to decipher the truth regarding Shroud and her true purpose as she tries to force him and Philip to join together into the ultimate W to defeat Ryubee.

A suspicious woman hires Shotaro to find a Dopant who is running amok while taking the name "Kamen Rider" as his own.

When Shotaro is hired to find the daughter of his barber, he discovers horrible new developments regarding the Gaia Memories.

Ryu must master the Trial Memory in order to save Nagi from Shinkuro, who has made his move with Saeko for Ryubee's downfall.

A request from a worker at the Futo museum forces Shotaro to find an artifact required by Ryubee for his final master plan.

Shotaro and Philip investigate a Dopant stalker causing chaos in order to impress Wakana.

Shotaro is hired to find a mysterious man's family, while Philip is confronted by Wakana about her position in Museum with her sister gone.

As Ryu tries to gain more information regarding Yamashiro's knowledge of Museum, Philip contemplates leaving Futo forever with Wakana.

Shotaro and Ryu are asked by a mother to save her daughter, who has become an old woman. Meanwhile, Shroud wants Phillip and Ryu to become Kamen Rider Double CycloneAccel Xtreme.

A request from Queen and Elizabeth leads to an investigation of a terrible street performer mysteriously winning a popular singing competition.

While trying to figure a means to defeat the tricky Liar Dopant, Shotaro confronts Jimmy about his confidence and trust in his only fan.

Akiko and Philip desperately try to stop Ryu from taking immediate revenge on Shinkuro when he becomes key to saving Lily from her deadly Gaia Memory.

With Shotaro trapped in fear and Ryu injured, Philip is at the mercy of his father Ryubee, who prepares to use his deceased son and Wakana to bring about Gaia Impact.

Discovering 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.

Makura involves Shotaro in a case in rooting out a traitor within the Fuuto police leaking out information on the Gaia Memories.

An air-headed female magician who turns invisible asks Shotaro to find the seller of her Gaia Memory, which ultimately leads Ryu to the man who killed his family.

Shotaro fights to prevent Yukie from joining Museum for the sake of herself and of the memory of her deceased brother Kirihiko.

Jinno asks Shotaro to help him find a cold-hearted, diamond-obsessed woman who set him up for arrest.

Shotaro fights to save Rui from destroying herself, while Philip tries to figure out how to outsmart Wakana in gaining his library research.

Philip chooses to ask Shotaro to help him find Wakana, who is being held by Kazu for Foundation X's own plans, so he could see her one last time.

After being in prison for 10 years, an old client of Sokichi's asks Shotaro to help him uncover some information - which he had asked Sokichi to look into before being arrested.

Shotaro decides to help a peculiar woman find her lost cat while Ryu investigates people committing strange actions beyond their control.