|This article is about a/an episode in Chikyuu Sentai Fiveman.|
|WARNING: This episode contains scenes of blood and character death. Viewer discretion is advised!|
The Five Sibling Warriors (五兄弟戦士 Go Kyōdai Senshi) is the first episode of Chikyuu Sentai Fiveman. It is the first episode of the opening two-part storyline.
20 years after their parents were killed by the Silver Imperial Army Zone, the five Hoshikawa siblings embrace their arrival on Earth as they begin their battle against them as Fiveman.
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- Gaku Hoshikawa (星川 学 Hoshikawa Gaku): Toshiya Fuji (藤 敏也 Fuji Toshiya)
- Ken Hoshikawa (星川 健 Hoshikawa Ken): Kei Shindachiya (信達谷 圭 Shindachiya Kei)
- Fumiya Hoshikawa (星川 文矢 Hoshikawa Fumiya): Ryouhei Kobayashi (小林 良平 Kobayashi Ryōhei)
- Kazumi Hoshikawa (星川 数美 Hoshikawa Kazumi): Kazuko Miyata (宮田 かずこ Miyata Kazuko)
- Remi Hoshikawa (星川 レミ Hoshikawa Remi): Ryo Narushima (成嶋 涼 Narushima Ryō)
- Arthur G6 (アーサーG6 Āsā Jī Shikkusu, Voice): Rica Matsumoto (松本 梨香 Matsumoto Rika)
- Doctor Hoshikawa (星川博士 Hoshikawa Hakase): Kiyotaka Mitsugi (三ツ木清隆 Mitsugi Kiyotaka)
- Midori Hoshikawa (星川緑 Hoshikawa Midori): Megumi Ishii (石井めぐみ Ishii Megumi)
- Galactic Empress Meadow (銀河皇帝メドー Ginga Kōtei Medō): Chika Matsui (松井千佳 Matsui Chika)
- Galactic Empress Meadow (Voice): Keiko Konno (金野恵子 Konno Keiko)
- Captain Garoa (ガロア艦長 Garoa-kanchō): Takeshi Ishikawa (石川武 Ishikawa Takeshi)
- Galactic Swordsman Billion (銀河剣士ビリオン Ginga Kenshi Birion): Shunsaku Kudou (工藤俊作 Kudō Shunsaku)
- Galactic Scientist Doldora (銀河博士ドルドラ Ginga Hakase Dorudora): Hatsue Nishi (西初恵 Nishi Hatsue)
- Galactic Merchant Dongoros (銀河商人ドンゴロス Ginga Shōnin Dongorosu, Voice): Takuzou Kamiyama (神山 卓三 Kamiyama Takuzō)
- Galactic Fang Zaza (銀河の牙ザザ Ginga no Kiba Zaza): Motoko Watanabe (渡辺元子 Watanabe Motoko)
- Gaku Hoshikawa(Child): Yuki Tokura (土倉有貴 Tokura Yūki)
- Ken Hoshikawa(Child): Kentaro Tamiya (田宮賢太朗 Tamiya Kentarō)
- Kazumi Hoshikawa(Child): Kanami Uematsu (植松佳菜美 Uematsu Kanami)
- Viewership: 8.3%
- The present day events of Fiveman are placed as commencing in spring of 1990, corresponding with the premiere date.
- The song taught by Remi to her music class will be used several more times in Super Sentai: it is used during a music lesson in an episode of Kakuranger (where Remi's actress, Ryo Narushima is another role); but is more notably used multiple times by Koume "Umeko" Kodou in Dekaranger.
Chikyuu Sentai Fiveman Volume 1 features episodes 1-9. 
- The Wrath - Power Rangers counterpart in Power Rangers Super Megaforce. See comparison page. (FiveYellow debut)