Ep. 1: Kunato und Mozuki werden von Parasiten gefangen und gezwungen, andere zu kontrollieren, während Nagate Verlust und Kampf bewältigen muss.

Upon passing by the door, Kunato and Mozuki discover Ochiai's abandoned lab and fall into a trap, with their bodies hijacked by parasites. Now under Ochiai's control, Kunato and Mozuki visit Numi's lab and puts her body under control of a parasite as well. When Nagate appears to visit Placental Shizuka, he learns that she was moved somewhere else. Depressed upon her disappearance, Nagate hears from Yuhata that Placental Shizuka is under custody for research and that he must not see her again. He then turns to Kunato for answers, but to no avail. Some time later, a massive Gauna approaches Sidonia and Nagate joins the sortie against it, piloting his new guardian, the "Tsugumori Kai". However, Nagate and the other pilots fail to break through the enemy's upgraded placenta until a huge Gauna-like creature appears to assist them. With Kunato acting as its pilot, the creature introduces itself as Tsumugi Shiraui. (Source: Wikipedia)
Episoden
- Ep. 1 · Kunato und Mozuki werden von Parasiten gefangen und gezwungen, andere zu kontrollieren, während Nagate Verlust und Kampf bewältigen muss.
- Ep. 2 · Tsumugi offenbart nach dem Kampf ihre Chimera-Natur, während Kobayashi die Forschungsdaten sichert
- Ep. 3 · Sidonia macht sich auf zum Lem-Sternensystem, während Tsumugi einer verborgenen Gauna-Bedrohung gegenübersteht.
- Ep. 4 · Tsumugi schützt Sidonia vor einem Gauna-Laserstrahl, während Nagate den Hauptkern zerstört.
- Ep. 5 · Izana und Tsumugi erhalten Prothesen und Regeneration, während Sidonia das Lem-Sternensystem erreicht