- Written by Keiichi HasegawaDirected by Kyohei Yamaguchi
Brain enters the room and both Nira and Brain reveal that their ultimate objective is to force Shinnosuke to throw away his pride as an officer and as a Kamen Rider by killing Nira. The pair then show him an image of Yukari lying down under effect of Brain's neurotoxin and reveal that she will die in 40 minutes unless Shinnosuke kills Nira with his gun, threatening to use the poison in her body to kill her instantly if Shinnosuke attempts to resist. Chase, who was warned about her condition by Shift Speed Prototype, attempts to save her with Mad Doctor to no avail and then flees away with her.
Meanwhile, Heart defeats Deadheat Mach but just as he is about to retrieve the tablet, Banno attacks him and knocks him down. When Medic appears to awaken him, Go had already fled with the tablet. Back to the office, Nira and Brain steals Mr. Belt and all of the Shift Cars in Shinnosuke's possession and puts them in a bag. Brain then leaves the building, claiming to the police that Shinnosuke is holding Nira hostage and intends to kill him, while Chase takes Yukari to Go for Banno to use his powers to treat her. Brain watches through a monitor as Nira keeps provoking Shinnosuke, when the video feed is brefly cut, and after the video is restored, the time limit set by Brain ends and Shinnosuke decides to pull his gun and shoot at Nira, but he ends up missing the target on purpose. Nira then shoots at Shinnosuke with the same gun he used to kill Eisuke and apparently kills him.
Some time later, Nira and Brain hold another press conference claiming that Nira shot Shinnosuke at self-defense and that Yukari was a victim of the Kamen Riders, when both Yukari and Shinnosuke arrive, much to their surprise, to expose their lies. It is then revealed that Banno saved Yukari by digitizing her body inside the tablet and then returning her back, freed from the poison, and that afterwards she, Go and Chase sent a message to Shinnosuke showing that she was fine when the video feed was briefly cut. It is also revealed that Shinnosuke hinted Mr. Belt to send Dimension Cab to stop the bullet when Nira shot at him. Shinnosuke then shows an exam comparing the bullet he took and the one that killed his father twelve years before, confirming that both came from the same gun and proving that Nira is the true culprit.
Nira and Brain then fuse to attack the Kamen Riders, sending some other Roidmudes as well, but Drive Type Tridoron, Deadheat Mach and Chaser easily defeat them. Brain then decides to face all three Riders in his Super Evolved form, just to be defeated by a triple Rider Kick, albeit his core survives and escapes. As Nira is arrested for his crimes, Shinnosuke rejoices as he finally has brought his father's murderer to justice, while a defenseless Brain is tortured by Medic for all the humiliation he caused to her, and Heart ponders about what secrets could lie inside the tablet containing Banno's conscience.
- Crocodile Tears: Nira sheds these when announcing Yukari's "death," shortly before his scheme is exposed.
- Don't Celebrate Just Yet: When Nira is finally arrested, he exclaims that the war between the Kamen Riders and the Roidmudes is still far from over.
- Gratuitous Spanish: The Large Ham that he is, Nira pulls this trope when he is about to shoot Shinnosuke.
- Mitsuhide Nira: Adios, Kamen Rider!
- I Never Said It Was Poison: When Brain sees Yukari alive and well, he blurts out that his poison should have killed her... Right in front of a crowded room. Even Nira points out how stupid that was.
- Indy Ploy: How Shinnosuke manages to survive Nira's trap.
- Kick the Dog: The first half of the episode is practically this done by Nira to Shinnosuke.
- Near-Villain Victory: Nira and Brain were this close to destroying their enemy, physically and mentally.
- Useless Security Camera: While Brain watches Nira facing down Tomari, the camera feed momentarily stops. It was caused by Banno, and that time was more than enough for Shinnosuke to come up with a counter-plan.
- Strike Me Down with All of Your Hatred!: Nira urges Shinnosuke to shoot him in order to prove his point on how ever human has a monster inside of them.
- Spanner in the Works: Banno is able to save Yukari, thus taking away Nira's trump card against Shinnosuke.
- Villain Ball: Brain reveals that he could kill Yukari at any given time, and that the one hour for Shinnosuke to kill Nira is just to torment him. It really backfires on him.
- Xanatos Gambit: Nira and Brain's plan is a particularly diabolical one: in order to save Yukari from Brain poison Shinnosuke must kill Nira in one hour time. If he does that, he will be a criminal and give Nira the satisfaction of completely dirtying the Tomari name. If he doesn't shoot him, Nira will shoot him, with the same gun he used to kill Eisuke no less, and Yukari will die.
- You Have Outlived Your Usefulness: One that doesn't end in death. Brain tells Nira that he was only using him to achieve Super Evolution and punches Nira in the face.
- The Roidmude Count: 49The Answer: It will guide it towards the truth of Eisuke Tomari's death.
