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...
Outside the Land of Light's atmosphere, the fierce battle begins with Tregear dodging the warriors' attacks, Ginga and Victory punch Tregear but he landed on a moon-like meteorite. New Generation Heroes landed on it while Ginga tells Tregear his ambitions ends here, he declared that disappeared but mines, which is a trap, explode. Taro comes to Tregear, "One who has fallen into darkness must not be allowed near the Land of Light." Taro said, but they clash into battle. The Tri-Squad come to heroes, but this time, they'll stop Tregear, the sinister foe. "This'll be an opportunity to show off our ultra team-work." Taiga exclaimed. Heroes gave accessories to Tri-Squad before they left. As Tregear summons the black lightning, Tri-Squad dodge the attack behind Taro, who told that his three are no match for his foe. Fuma slashes Tregear using a hand, Titas energy punches the foe, and Taiga performs Strium Blaster, ultimately dodged by the black hero. Tregear performs Trera Ardiga to defeat Titas and Fuma, turned into particles, Taiga dashes to the foe but attacked by Tregear using Trera Cheir Phos, turned into red particles, then disappeared into space. Taro watches Taiga's death but soon, he performs Ultra Dynamite also Tregear does the same said attack, ramming through each other before the big explosion occurs.
On Earth, twelve years later, the young man became the rookie member, Hiroyuki Kudo, drives his car alongside his brother, Homare Soya, and Alien Rivers Kawazu. Suddenly, the civilians shoot the dark blue fireballs to Hiroyuki's car but dodged. Meanwhile, in the headquarter, EGIS, Kana Sasaki, president of EGIS, watches the footage while Homare calls her, Pirika Asahikawa, Hiroyuki's friend, does. On Earth secretly inhabited by extraterrestrials, Hiroyuki brakes his car as civilians accidentally shoot to each other, revealing Cicada Human and Alien Ckalutch. As Kawazu left, Hiroyuki told that Homare's not our problem after that as Hiroyuki runs away. He saw Kawase, Alien Magma Maguma appeared before doing a battle against Hiroyuki. As a vent opens, revealing baby Zandrias, Maguma steals Hiroyuki's monster friend before he disappears. Pirika saw Maguma's target, so that he prepares to defeat the alien. After he electrocutes the civilian, Kawasu told Hiroyuki that Kawasu's not even an Earthling. As they run to Maguma, holding baby Zandrias, "It's showtime!" he shouted, the bioweapon kaiju, Zegun, burrowed up the ground.
The people chased by Zegun, crashing the building, while the human host of Tregear, Kirisaki, watches. At the construction site, Maguma tries to cry baby Zandrias out, Suddenly, its young mother, performing Young Mother Beam to and kicking Zegun, came. Alien Markind Markind is in charge of auctioning Zegun for Villain Guild. Kirisaki watches the kaijus' battle, unfortunately, he commands the summon. The dangerous kaiju, Hellberus, came down the city after defeating Zegun, Hellberus' tail attacks the young mother Zandrias, Maguma throws baby Zandrias before he left, the building crumbles that Homare saved Kawasu. Hiroyuki trapped inside the ruined building, but he saw baby Zandrias, trapped inside the rocks, he really tries to save the baby, and Hellberus fires a fireball that Hiroyuki awoke from the monster.
The key holder told him that they will get baby Zandrias and its young mother after defeating Hellberus, soon, the light transformed into Taiga Spark, he grabs the key holder and scans the Spark before he transforms for the first time into the hero of light, Ultraman Taiga, who saved baby Zandrias. Taiga decides for his first battle on Earth. Hellberus summons energy arrows to defeat him, dodged by using Swallow Bullet, fires the dark red lightning but shielded, and shoots a fireball but chopped by the light hero. He performs Strium Blaster to defeat it but defended by its armor. And using Orb-let to perform Supreme Blaster to defeat it, putting its end for good. He grabs the ring-type accessory, then flew away after Kirisaki watches with the shadow version of Tregear. Taiga detransformed into Hiroyuki before seeing the holographic light hero. Then, young mother Zandrias left alongside its baby before the life saved, she waved goodbye to Hiroyuki and Taiga...
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 Inter Galactic Defense Force, 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 Inter Galactic Defense Force, 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 Soya (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: Satoru Okabe (岡部 暁 Okabe Satoru)
- Ultraman Tregear: Shinnosuke Ishikawa (石川 真之介 Ishikawa Shinnosuke)
- Ultraman Ginga: Daisuke Terai (寺井 大介 Terai Daisuke)
- Ultraman Victory: Shota Yakura (矢倉 翔太 Yakura 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)
- Zegun: Hiroyuki Arai (新井 宏幸 Arai Hiroyuki)
- Young Mother Zandrias: Hitomi Adachi (安達 仁美 Adachi Hitomi)
- Ultraman Taiga
- Ultraman Titas
- Ultraman Fuma
- Ultraman Ginga
- Ultraman Victory
- Ultraman X
- Ultraman Orb
- Ultraman Geed
- Ultraman Rosso
- Ultraman Blu
- Ultraman Taro
- Ultraman Tregear
- Homare Soya
- Pirika Asahikawa
- Young Mother Zandrias
- Baby Zandrias
- Alien Magma Maguma
- Alien Markind Markind
- Cicada Human
- Alien Ckalutch
- 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.