- Written by Shogo MutoDirected by Kyohei Yamaguchi
Sento: Kamen Rider Build, the ‘brilliant’ physicist Kiryu Sento, is pursuing the truth about the murder of Katsuragi Takumi to prove Banjo Ryuga’s innocence. The true culprit is prove to be Isurugi Souichi, who is actually Stalk. Sento manages to overcome his doubts to win his battle against him.
Ryuga: Who would’ve thought the owner was Stalk… Wait, what’s gonna happen to the cafe?
Sento: The place’s been empty since the first episode, I’m sure it’ll be fine.
Ryuga: That’s not the issue! And where are we gonna get money?!
Sento: Well… Now, what’ll happen on Episode 15?!
Ryuga: Don’t play dumb.
- Bait-and-Switch: Two examples:
- When Gentoku leads a squad of Guardians and personnel on nascita, they find nobody there and the fake refrigerator seems to have been replaced with a real one to hide the secret entrance.
- Later when Sento and Ryuga confront Gentoku in the parking garage and leave, Gentoku tries to take Pandora’s Box since they left it behind, only to learn that it was actually a hologram.
- Double Meaning: When Soichi was about to leave the basement with the usb, Misora finds him and they talk for a brief moment. Soichi tells Misora his “part-time job” was going to keep him away from home more than usual and sounds like he was still lying to her about his true objectives, but Misora then changes to talk about how she will cherish the memories she had with her dad for the past year, almost sounding like a sort of goodbye to how things used to be. By the time Soichi leaves, Misora just crumples onto the floor in tears.
- Engineered Public Confession: Attempted. Sento confronts Gentoku to try and get him to confess to being Night Rogue, but Ryuga flies off the handle and not only gives himself away, but also the now open secret that they were trying to record him confessing. However, the events for the rest of the episode end up resulting in Gentoku being exposed anyway (in front of his own father, no less).
- Foreshadowing: Gentoku sheds some light on the hint Soichi mentioned in the last episode about a secret project involving the word “Sclash,” which Sento finds in Takumi’s data archive as a potential expansion of the Kamen Rider system by taking a FullBottle's essence and converting it into a gel. Sento does manage to complete the data and only needed to make the physical objects. Unfortunately, Soichi manages to sneak away with the completed data on a usb drive.
- I Am Not Left-Handed: Night Rogue reveals that like with Blood Stalk’s energy cobras, he can create large bat wings to increase his speed and allow him to fly.
- "I Know You're in There Somewhere" Fight: A dark example. While fighting with Sento for the second time in the episode, Gentoku keeps telling him to come to his senses already as if they were close comrades...
- Lured into a Trap: Sento and Ryuga were called by Prime Minister Himuro Taizan to meet with him in the hospital he was staying at, but after realizing that the hallway they were in had a suspicious lack of guards, they were then ambushed by a mob of Guardians.
- This Is Unforgivable!: When Prime Minister Himuro learns that Gentoku was actually a member of Faust all along, Himuro chews Gentoku out for acting like an irresponsible child before apologizing to the nascita crew for the inconvenience and reclaiming custody of Pandora’s Box.
- Wham Line: Gentoku reveals Soichi told him that Takumi Katsuragi was not only alive, but changed his appearance, and then directly tells Sento to his face that he is in fact Takumi Katsuragi before delving into an Evil Laugh.
