|This article is about a/an episode in Kamen Rider 555.|
The Dark Laboratory (闇の実験室 Yami no Jikkenshitsu) is the twenty-fifth episode of Kamen Rider 555.
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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.
- Takumi Inui (乾 巧 Inui Takumi): Kento Handa (半田 健人 Handa Kento)
- Mari Sonoda (園田 真理 Sonoda Mari): Yuria Haga (芳賀 優里亜 Haga Yuria)
- Keitaro Kikuchi (菊池 啓太郎 Kikuchi Keitarō): Ken Mizorogi (溝呂木 賢 Mizorogi Ken)
- Yuji Kiba (木場 勇治 Kiba Yūji): Masayuki Izumi (泉 政行 Izumi Masayuki)
- Yuka Osada (長田 結花 Osada Yuka): Yoshika Kato (加藤 美佳 Katō Yoshika)
- Naoya Kaido (海堂 直也 Kaidō Naoya): Mitsuru Karahashi (唐橋 充 Karahashi Mitsuru)
- Masato Kusaka (草加 雅人 Kusaka Masato): Kohei Murakami (村上 幸平 Murakami Kōhei)
- Itsuro Takuma (琢磨 逸郎 Takuma Itsurō): Jun Yamasaki (山崎 潤 Yamasaki Jun)
- Saeko Kageyama (影山 冴子 Kageyama Saeko): Waka (和香 Waka)
- Smart Lady (スマートレディ Sumāto Redi): Hitomi Kurihara (栗原 瞳 Kurihara Hitomi)
- Kyoji Murakami (村上 峡児 Murakami Kyōji): Katsuyuki Murai (村井 克行 Murai Katsuyuki)
- Hanagata (花形 Hanagata): Koji Naka (中 康治 Naka Kōji)
- Kazufumi Mizuno (水野 和史 Mizuno Kazufumi): Kengo Ohkuchi (大口 兼悟 Ōkuchi Kengo)
- Tetsuo Itagaki (板垣 哲生 Itagaki Tetsuo): Atsushi Fukazawa (深沢 敦 Fukazawa Atsushi)
- Yoshio Kobayashi (小林 義雄 Kobayashi Yoshio): Masato Uchiyama (内山 眞人 Uchiyama Masato)
- Mari Sonoda(Child): Aoi Yuki (悠木 碧 Yūki Aoi)
- Masato Kusaka(Child): Yusuke Ito (伊藤 祐介 Itō Yūsuke)
- When Faiz execute Grand Impact, the Exceed Charge sound is from Kaixa Phone's.
- As part of Super Hero Time , this episode aired alongside Bakuryuu Sentai Abaranger episode 21, Ep. 21: Abare Love! Kilokilo.
- 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 learned that the name for the third belt is Delta.
- Murakami transforms into his Orphenoch 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 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 Orphenoch.
- The scene where Kaixa fights the Rabbit Orphnoch in a stadium-like area foreshadows a very identical location from episode 4 of Kamen Rider Decade, where Decade is forced to fight Kamen Rider Kaixa when Kiva-la sends him to another dimension.
- Yoshio Kobayashi is portrayed by Masato Uchiyama who later portrays Ren Senjyu in Ultraman Nexus, and Shun Kageyama in Kamen Rider Kabuto.
Blu-ray Box 2 comes with 17 episodes.