5 Seconds Before the Great Explosion of the Land of Ultra! (ウルトラの国 大爆発5秒前! Urutora no Kokudai Bakuhatsu 5-byō mae!) is the thirty-third episode of Ultraman Taro. It is the first part of a two-part arc which sees all five previous Ultra Brothers a third time with but this time with Susumu Kurobe respiring his role as Shin Hayata, Kohji Moritsugu as Dan Moroboshi, Jiro Dan as Hideki Go and Keiji Takamine as Seiji Hokuto.
In space, the alien named Temperor prepares to invade the Land of Light and obliterate the Ultra Brothers. Just before he can execute the operation, his boss remind him that the Ultra Brothers are currently making their way to Earth and the vile alien decided to pursue them towards the same planet. The four brothers resume their human appearances to greet Kotaro in his barbecue feast, leaving Zoffy as he choose to patrol the sky.
Realizing that Temperor had arrived and begins to attack the city, the rest of the Brothers had Taro luring their alien nemesis away from Tokyo while ZAT raced to the scene with alien researcher Dr. Ootani on board. Kotaro transforms into Taro but when the alien sees through his plan, he stopped and simply continue to attack the city. Out of options, Taro was forced to back away and left ZAT to handle Temperor. The brothers were forced to have fighting Temperor alone as they wanted to avoid an interracial conflict between two aliens at the expense of Earth. Zoffy presented them an idea to observe Taro without directly getting involved into the conflict. By capturing the ZAT aircraft, the 5 Brothers possessed Ootani and the rest of the four ZAT officers.
None of Taro's attacks are effective and instead he was knocked out of transformation twice. The Brothers eventually realized the true danger of Temperor and decided to fight him on their own. Spotting Eiichi's Ultraman Ball, Taro shrank himself and the young boy throw the ball towards Temperor. Once the ball reached his face, Taro jumped into Temperor's mouth and detonate the vile alien from within. Although the Brothers celebrated his victory, Alien Temperor isn't truly dead and his boss swore that they had fallen to his trap.
"You think you've won? Mistake! The six of you have finally shown yourself! That was just a precious sacrifice to lure you out. Ultra Brothers, we shall put an end to all of you on Earth."
"The Alien Temperor was not dead. Taro did not actually win. The Ultra Brothers are still targets. What did that last creepy voice means?"
- ―Naughty Suzy and narrator.
- Kotaro Higashi (東 光太郎 Higashi Kōtarō): Saburo Shinoda (篠田三郎 Shinoda Saburo)
- Shuhei Aragaki (荒垣 修平 Aragaki Shūhei): Takahiko Higashino (東野孝彦 Higashino Takahiko)
- Tadao Nanbara (南原忠男 Nanbara Tadao): Toyoyuki Kimura (木村豊幸 Kimura Toyoyuki)
- Takeshi Uneo (上野孝 Uneo Takeshi): Akihiko Nishijima (西島明彦 Nishijima Akihiko)
- Tetsuya Kitajima (北島哲也 Kitajima Tetsuya): Shusuke Tsumura (津村秀祐 Tsumura Shūsuke)
- Saori Shiratori (白鳥さおり Shiratori Saori):Keiko Ono (小野恵子 Ono Keiko)
- Kenichi Shiratori (白鳥健一 Shiratori Ken'ichi):Shinya Saito (斎藤信也 Saitō Shin'ya)
- Narrator (ナレーター Narētā): Tetsuro Sagawa (瑳川哲朗 Sagawa Tetsurō)
- Otani Eiichi (大谷栄一 Ōtani Eiichi): Masatoshi Nishiwaki (西脇政敏 Nishiwaki Masatoshi)
- Doctor Otani (大谷博士 Ōtani hakase): Katsu Ryuzaki (竜崎勝 Ryūzaki Katsu)
- Shin Hayata/Ultraman (ハヤタ・シン Hayata Shin/ウルトラマン Urutoraman) - Susumu Kurobe (黒部 進 Kurobe Susumu)
- Dan Moroboshi/Ultraseven (モロボシ・ダン Moroboshi Dan/ウルトラセブン Urutorasebun) - Kohji Moritsugu (森次 晃嗣 Moritsugu Kōji)
- Hideki Go/Ultraman Jack (郷 秀樹 Gō Hideki/ウルトラマンジャック Urutoraman Jakku) - Jiro Dan (団 時郎 Dan Jirō)
- Seiji Hokuto/Ultraman Ace (北斗 星司 Hokuto Seiji/ウルトラマンエース Urutoraman Esu) - Keiji Takamine (高峰 圭二 Takamine Keiji)
- Zoffy (ゾフィー Zofī Voice): Mitsuru Saijo (西条満 Saijō Mitsuru)
- Alien Temperor (テンペラー星人 Tenperā Seijin Voice): Eiji Maruyama (丸山 詠二 Maruyama Eiji)
- Ultraman Taro (ウルトラマンタロウ Urutoraman Tarō): Hiroshi Nagasawa (長沢寛 Nagasawa Hiroshi)
- Ultraman Taro Volume 8 features episodes 30-33.
- When Dan Moroboshi transforms into Ultraseven, he is seen wearing his UG uniform instead of his Land of Light clothing. This is due to the use of stock footage.