X in Peril (狙われたX Nerawareta X) is the eighth episode of Ultraman X. It features the debut of Ultraman X's Zetton Armor and the guest appearance of Kaito Touma/Ultraman Max, in tribute to the tenth anniversary of Ultraman Max.
In the middle of battling Zetton, Ultraman X was defeated, even when using Eleking Armor. X tries Gomora Armor but the Oscillatory Wave can't penetrate Zetton's Zetton Shutter, even Xio's assistance proven futile. As the monster advances to a weaken X, it instead teleports away. Daichi ends up burns the midnight oil to create a new armor to counteract Zetton, but since he lacks its Spark Doll, the ingredient to create the Cyber Card and Armor is not enough.
The next day, Dr. Kaito Touma, a Spark Doll expert from the UNVER visits Xio and offers them his help as he presents the Zetton Spark Doll, knowing such threat would rise. Interestingly, he was also a friend of Daichi's father and the two were once studying Spark Dolls together. Sayuri and Kamiki excited that Daichi meets a person that knows his father but cautiously doubts on their age. After the completion of Cyber Zetton Card, Zetton wreaks havoc in the city again, prompting X to appear.
The Lab Team sends the Cyber Zetton Card and X uses it but suddenly, the Zetton Armor renders him immobile and worse, the armor can't be removed. Soon, another Kaito Touma appears and attacks the black coated person, revealing him to be Alien Sran Quila. Kaito transforms into another Ultraman and saves a mother-daughter pair from falling rubble. Dr. Guruman identifies the Ultraman as Ultraman Max, and the giant tries to remove X from the armor but instead, the cursed armor controls X and the enslaved Ultraman assist Zetton. Asuna approaches Quila as he revealed that he wanted revenge on Ultraman Max for killing one of his brethren back then. Studying Xio, UNVER and Daichi, he used the man's background and perfectly uses this camouflage. With X's mind completely fells under Zetton Armor's effect, Asuna fought Quila and the alien enlarges to assist Zetton. Daichi uses Cyber Eleking's card and purify Cyber Zetton's corrupted programming, saving Max on time. Now having X back, Ultraman Max finishes off Alien Sran Quila with Max Galaxy and Ultraman X attacks Zetton with the armor, greatly wounding it with Zetton Tornado before freeing himself and defeated it with a mid-air Xanadium Ray.
Approaching Daichi at a sunset, this man reveals himself as Ultraman Max and that he borrowed the appearance of the person he used to fight with. Wanting to help Daichi and X in the future, he lends a portion of his power in a form of a Cyber Card before leaving.
Daichi's Monster Lab
- Daichi: Daichi's Monster Lab! This time, we're looking at this monster...
- X Devizer: Analysing, Zetton!
- Daichi: Space Dinosaur Zetton, he was a fierce foe whom had X on the ropes.
- X: And the Zetton Armor we get from its Cyber Card contained a nasty trap set by the Alien Sran. But thanks to Daichi's use of the Zetton Armor, we were able to blast through the dangerous foe.
- Daichi and X: Well, see you next time!
- Daichi Ozora (大空大地 Ōzora Daichi): Kensuke Takahashi (高橋健介 Takahashi Kensuke)
- Asuna Yamase (山瀬アスナ Yamase Asuna): Akane Sakanoue (坂ノ上茜 Sakanōe Akane)
- Wataru Kazama (風間ワタル Kazama Wataru): Yoshihiko Hosoda (細田よしひこ Hosoda Yoshihiko)
- Hayato Kijima (貴島ハヤト Kijima Hayato): Ukyou Matsumoto (松本享恭 Matsumoto Ukyou)
- Mamoru Mikazuki (三日月マモル Mikazuki Mamoru): Hayato Harada (原田隼人 Harada Hayato)
- Rui Takada (高田ルイ Takada Rui): Haruka Momokawa (百川晴香 Momokawa Haruka)
- Takeru Yamagishi (山岸タケル Yamagishi Takeru): TAKERU
- Chiaki Matsudo (松戸チアキ Matsudo Chiaki): Chiaki Seshimo (瀬下千晶 Seshimo Chiaki)
- Sayuri Tachibana (橘さゆり Tachibana Sayuri): Sarara Tsukifune (月船さらら Tsukifune Sarara)
- Shotaro Kamiki (神木正太郎 Kamiki Shōtarō): Yuu Kamio (神尾 佑 Kamio Yū)
- Ultraman X (ウルトラマンエックス Urutoraman Ekkusu Voice): Yuichi Nakamura (中村悠一 Nakamura Yūichi)
- Ultraman X (ウルトラマンエックス Urutoraman Ekkusu Suit Actor): Sakaekei Iwata (岩田栄慶 Iwata Eikei)
- Alien Fanton Guruman (ファントン星人グルマン Fanton Seijin Guruman Voice): Yasunori Matsumoto (松本保典 Matsumoto Yasunori)
- Alien Fanton Guruman (ファントン星人グルマン Fanton Seijin Guruman Suit Actor): Hiroyuki Fukushima (福島弘之 Fukushima Hiroyuki)
- Kaito Touma disguises for Ultraman Max and Alien Sran Quila :Sota Aoyama (青山 草太 Aoyama Sōta)
- Ultraman Max (ウルトラマンマックス Urutoraman Makkusu Grunt): Kazuya Nakai (中井 和哉 Nakai Kazuya) (Stock footage)
- Ultraman Max (ウルトラマンマックス Urutoraman Makkusu Suit Actor): Shinnosuke Ishikawa (石川真之介 Ishikawa Shinnosuke)
- Zetton (ゼットン Zetton Suit Actor): Keita Rikimaru (力丸佳大 Rikimaru Yoshihiro)
- Alien Sran Quila (スラン星人クワイラ Suran Seijin Kuwaira Voice): Kenta Matsumoto (松本 健太 Matsumoto Kenta)
- Alien Sran Quila (スラン星人クワイラ Suran Seijin Kuwaira Suit Actor): Akira Okabe (岡部 暁 Okabe Akira)
- Ultraman X
- Eleking Armor
- Gomora Armor
- Zetton Armor (First appearance)
- Ultraman Max (Reintroduced and only appearance)
- This is the first time that a Cyber Armor was used against the kaiju the armor was based on.