Buddy Go! (バディゴー！ Badi Gō!) is the first episode of Ultraman Taiga.
It has been twelve years since Ultraman Taiga disappeared into space in the fierce battle with Ultraman Tregear. Hiroyuki Kudo gets caught up in an alien incident during a mission...
In a fierce battle between Ultraman Tregear and the New Generation Heroes, the young hero Ultraman Taiga, son of Taro, was attacked by Tregear, who then disappeared into space.
Twelve years later, on an Earth secretly inhabited by extraterrestrials, a young man Hiroyuki Kudo became a rookie member of the private security organization E.G.I.S.. He was soon involved in alien-related crime, during which the dangerous kaiju Hellberus appeared. Yet a light within Hiroyuki awoke to counter the beast!
Remembering the Future - Part 1 (未来の思い出す 前編 Mirai no Omoide Zenpen)
Taiga goes somewhere to shout his name in frustration, which irritates his friend Filis, a Blue Tribe Ultra who is slightly older than he is.
He then explains that on the Land of Light, the Silver and Red Tribes are much more suitable for battle and many of them join the Space Garrison, while Blue Tribe Ultras such as Filis are more clear-headed and many of them work as scientists in the Space Science and Technology Bureau, which has work in many areas such as backline support for the Space Garrison, creating new technologies, and managing old relics, which is what Filis does.
Taiga then talks about his father, Taro and explains that he is the biggest reason for his unhappiness, since everyone only sees him as Taro's son. He confides in Filis, who is apparently the only other person who sees Taiga for who he is.
Taiga then asks Filis about a capsule he is carrying. In it is a Triger Shot, which Filis says may be useful to Taiga, but he doesn't understand because it is so small. Filis then talks to him about a certain Ultraman who is Taiga's senior, and Taro's former pupil.
- Hiroyuki Kudo (工藤ヒロユキ Kudō Hiroyuki): Yuki Inoue (井上 祐貴 Inoue Yūki)
- Homare Souya (宗谷ホマレ Sōya Homare): Ryotaro (諒太郎 Ryōtarō)
- Pirika Asahikawa (旭川ピリカ Asahikawa Pirika): Ayuri Yoshinaga (吉永 アユリ Yoshinaga Ayuri)
- Kana Sasaki (佐々木カナ Sasaki Kana): Chiharu Niyama (新山 千春 Nīyama Chiharu)
- Kirisaki (霧崎 ): Kou Nanase (七瀬 公 Nanase Kō)
- Alien Rivers Kawazu (リヴァーズ星人河津 Rivāzu Seijin Kawazu): Shiro Ishizaki (石坂 史朗 Ishizaki Shiro)
- Ultraman Taiga (ウルトラマンタイガ Urutoraman Taiga): Takuma Terashima (寺島 拓篤 Terashima Takuma)
- Ultraman Titas (ウルトラマンタイタス Urutoraman Taitasu): Satoshi Hino (日野 聡 Hino Satoshi)
- Ultraman Fuma (ウルトラマンフーマ Urutoraman Fūma): Shota Hayama (葉山 翔太 Hayama Shōta)
- Ultraman Tregear (ウルトラマントレギア Urutoraman Toregia): Yuma Uchida (内田 雄馬 Uchida Yuma)
- Ultraman Taro (ウルトラマンタロウ Urutoraman Tarō): Hiroya Ishimaru (石丸 博也 Ishimaru Hiroya)
- Ultraman Ginga (ウルトラマンギンガ Urutoraman Ginga): Takuya Negishi (根岸 拓哉 Negishi Takuya)
- Alien Magma (マグマ星人 Maguma Seijin): Takaya Kuroda (黑田 崇矢 Kuroda Takaya)
- Alien Markind (マーキンド星人 Mākindo Seijin): Takeo Hirose (廣瀬 武央 Hirose Takeo)
- Ultraman Taiga: Hideyoshi Iwata (岩田 栄慶 Iwata Hideyoshi)
- Ultraman Titas: Yoshiki Kuwahara (桑原 義樹 Kuwahara Yoshiki)
- Ultraman Fuma: Akira Okabe (岡部 暁 Okabe Akira)
- Ultraman Tregear: Shinnosuke Ishikawa (石川 真之介 Ishikawa Shinnosuke)
- Ultraman Ginga: Daisuke Terai (寺井 大介 Terai Daisuke)
- Ultraman Victory: Shota Yagura (矢倉 翔太 Yagura Shōta)
- Ultraman X: Yuma Eichi (永地 悠斗 Eichi Yūma)
- Ultraman Geed: Kadai Rikimaru (力丸 佳大 Rikimaru Kadai)
- Ultraman Rosso: Yoshihiro Omura (大村 埒弘 Ōmura Yoshihiro)
- Ultraman Blu: Wataru Inaniwa (稲庭 渉 Inaniwa Wataru)
- Hellberus: Kenji Kajikawa (梶川 賢司 Kajikawa Kenji)
- Zegan: Hiroyuki Arai (新井 宏幸 Arai Hiroyuki)
- Young Mother Zandrias: Hitomi Adachi (安達 仁美 Adachi Hitomi)
- Ultraman Taiga (First appearance)
- Ultraman Titas (Flashback)
- Ultraman Fuma (Flashback)
- Ultraman Ginga
- Ultraman Victory
- Ultraman X
- Ultraman Orb
- Ultraman Geed
- Ultraman Rosso
- Ultraman Blu
- Ultraman Taro
- Ultraman Tregear (Flashback)
- Homare Souya
- Pirika Asahikawa
- Hellberus (First appearance)
- Zegan (Reintroduced and only appearance)
- Zandrias (Reintroduced and only appearance)
- Young Mother Zandrias
- Baby Zandrias
- Alien Magma Maguma
- Alien Markind Markind
- Cicada Human
- Alien Kukaratch
- The Ultra Dynamite used by Taro in the prologue of this episode is charged by Strium energy instead of simple flames. This effect was recycled from Ultraman Orb Burnmite's Stobium Dynamite.