The Dark Laboratory

is the twenty-fifth episode of Kamen Rider 555. It features the first look of SB-913B Kaixa Pointer and Rider Kick of Kaixa, the Gold Smash.
==Synopsis==
Smart Brain recovered Faiz and Kaixa as Kusaka was captured. Mari and others sneaked into Smart Brain to save him. While escaping from Takumi, both of them discovered the entrance to the underground Ryusei School. Over there they stumble into a startling discovery.
==Plot==
Smart Brain recovered Faiz and Kaixa gear as Masato was captured by Lucky Clover. Takumi escapes from the encounter with the help from Keitaro's van rushing into the scene. He informed Mari and Keitaro that Masato is kidnapped by Smart Brain. In the interrogation room, Masato wakes up only to be sitting on a chair and is being interrogated by Kyoji, Saeko and Itsuro. Masato tries to threaten Saeko with a fork, only to be subdued and knocked unconcious by Kyoji's firepower. Keitaro and Takumi disguises themselves as cleaning service to infiltrate into Smart Brain to save him. While being in their disguise, Keitaro starts vacuuming the floor simply because he is an OCD and only like stuffs to be cleaned. Takumi being annoyed by Keitaro's ethics managed to sneak peak into Smart Brain security camera feed, only to find Masato unconcious. Takumi managed to find the interrogation room and wakes Masato up escaping from Itsuro; both Takumi and Masato ran into a dead end, only for them to discover the entrance to the underground Ryusei School. Over there they went into an abandoned stumble into a startling discovery of a person being used as a lab rat to test a new rider belt only to be disintegrated.
Hanagata observing the scene from afar leaves, making Masato to pursue the mysterious man while Takumi follow suit.
Meanwhile back at Smart Brain office, Kyoji congratulate Yoshio and Naoya for retriving Faiz and Kaixa gear. However, he only offered one position in Lucky Clover. To officially be a member of Lucky Clover, Kyoji requests Yoshio and Naoya to kill a traitor Orphnoch, Yuji. Yoshio is excited and wanted to be member of Lucky Clover, however, Naoya is in dismay only wishing Yoshio good luck and left the scene; Naoya went home to pack his bag, he is being stopped by Yuka and Yuji only to brush them aside and tell them he wanted to kill Yuji and be a member of Lucky Clover. Not too long, a Rabbit Orphnoch appeared causing nearby explosions in attempt to kill Yuji. Out of self-defense, Yuji transforms into a Horse Orphnoch, fought the Rabbit Orphnoch, forcing the Rabbit into retreat. Naoya left the scene in pursuit of Rabbit Orphnoch, knowing it was Yoshio's doings.
Back in the underground Ryusei School, Takumi and Masato found a second lab rat at the stairway, similar to the previous lab rat victim. Itsuro and Saeko transformed to Faiz and Kaixa to pursue Takumi and Masato. Faiz and Kaixa are being halted by the lab-rats' belt being explode right in front of them, giving time for Takumi and Masato to escape. Takumi and Masato ran into a make-shift labatory in a classroom, Takumi saw a similar belt on just like the lab rats wore. Hanagata's voice warned them not to use it, as it is a failed experiment. Then Takumi and Masato are being pursued by Faiz and Kaixa only to be intervened by Goat Orphnoch; The Goat Orphnoch takes out Faiz, Takumi retrieves Faiz gear and transformed into Faiz, defeats Kaixa and Masato retrieves his gear to transform into Kaixa, both Faiz and Kaixa fight and defeat the Orphnochs, forcing them into retreat. Not long after, the fight Hanagata's voice also encourages Masato to keep fighting on against the Orphnochs to search for his own answers. Masato retrieves Kaixa's pointer dropped from the ceiling.
In the alley, Naoya found Yoshio panting, recovering from a previous fight with Yuji. Yoshio gets confronted and warned by Naoya not to get close to Yuji. Being confused and disappointed with his senior, Yoshio left the scene and  decides to kidnap Yuka to lure Yuji out. After rescuing Yuka, Naoya got very upset of Yoshio's misdeeds, he decides to fight Yoshio alongside with Yuji; which led to Yoshio retreat into the Stadium. Then he encounters Kaixa, only to be killed by Kaixa's new weapon, Kaixa's pointer and being finished off with Gold Smash.
==Cast==
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===Guest Cast===
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*Mari Sonoda (Child): 
*Masato Kusaka (Child): 
==Errors==
*When Faiz execute Grand Impact, the Exceed Charge sound is from the Kaixa Phone.
==Notes==
*As part of Super Hero Time , this episode aired alongside episode 21, .
*Viewership: 10.5%
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*It is shown in the laboratory, several experimental belts are on display that were called "failures". Some believe that among them is the Alpha belt.
**From the view point of movie continuity, they may also be the prototype of the Psyga Gear.
*It is revealed that the name for the third belt is Delta.
*Murakami transforms into his Orphnoch form for the first time.
*At 07:30, the artwork on the elevator door has the same design as the art piece hung in Kiba's apartment.
*The secret room in Smart Brain is revealed to be the Ryuusei School.
*Both Itagaki and Mizuno died from the side effects of the test-product belts.
*Kusaka is given the guidance to keep fighting against the Orphnochs.
*When the Goat Orphnoch first shows up in this episode, the sound effect was cut from Kamen Rider Ryuki.
==DVD releases==
Kamen Rider 555 Volume 7 features episodes 25-28: The Dark Laboratory, Enter, Delta, Ryusei School Breaks Up and Dark Clover.
Blu-ray Box 2 comes with 17 episodes.
Category:Kamen Rider 555
Category:Episodes