Synopsis
After barely escaping a collision with a gigantic Gauna at the cost of many human lives, Kobayashi-the captain of the spaceship Sidonia-is prompted to change her political paradigm. Once she seizes full power, Kobayashi aims to eradicate the Gaunas from the Lem system where former Sidonians have recently established a colony. Her ambition is justified by two breakthroughs: the development of highly effective, long-range anti-Gauna weapons, and the creation of Tsumugi Shiraui-the first human-Gauna chimera possessing great destructive power. Facing hostility toward chimeras and her uncertain large-scale military expedition, Kobayashi enlists the help of the new elite pilot Nagate Tanikaze. Due to his personal experiences with Shizuka Hoshijiro and Benisuzume's placenta, Tanikaze soon develops a close bond with Tsumugi. As the final battle against humanity's most formidable opponent approaches, Tanikaze tries to enjoy the last days of peace with his friend Izana Shinatose-all while Kobayashi secretly pursues the development of an experimental weapon that could very well lead to the complete destruction of Sidonia. [Written by MAL Rewrite]
Details
Where to Watch Knights of Sidonia: Battle for Planet Nine?
Knights of Sidonia: Battle for Planet Nine is available to watch online free on various streaming platforms. Sci-Fi, Mecha, Seinen anime with 12 episodes in HD quality. Check Crunchyroll, Netflix, Disney+, Amazon Prime for availability.
Frequently Asked Questions
Where can I watch Knights of Sidonia: Battle for Planet Nine online for free?
Knights of Sidonia: Battle for Planet Nine (אבירי צידוניה: קרב על כוכב הלכת תשע) is available on streaming platforms including Crunchyroll, Netflix, Disney+, Amazon Prime. Sci-Fi, Mecha, Seinen anime with 12 episodes. Check each platform for availability.
How many episodes does Knights of Sidonia: Battle for Planet Nine have?
Knights of Sidonia: Battle for Planet Nine has 12 episodes. Type: TV. Status: Finished Airing. Studio: Polygon Pictures.
Is Knights of Sidonia: Battle for Planet Nine worth watching?
Knights of Sidonia: Battle for Planet Nine has a rating of 7.72/10 on MyAnimeList based on 66,532 votes. Genre: Sci-Fi, Mecha, Seinen. Popularity rank: #2026.
Will there be a new season of Knights of Sidonia: Battle for Planet Nine?
Current status: Finished Airing. Check for announcements about new seasons.
What is Knights of Sidonia: Battle for Planet Nine about?
Knights of Sidonia: Battle for Planet Nine (2015) is a TV anime in the Sci-Fi, Mecha, Seinen genre by studio Polygon Pictures. Source: Manga.
Summary - Watch Knights of Sidonia: Battle for Planet Nine Online
Knights of Sidonia: Battle for Planet Nine (אבירי צידוניה: קרב על כוכב הלכת תשע) is a TV anime in the Sci-Fi, Mecha, Seinen genre with 12 episodes rated 7.72/10. Watch Knights of Sidonia: Battle for Planet Nine online free with subtitles on Crunchyroll, Netflix, Disney+, and more. Studio: Polygon Pictures. Best anime 2026. Updated: 09/04/2026.