Ep. 17: Shima and Shizuno explore the Zegapain Caladrius while Sin infiltrates the Oceanus to question the Cerebrants.
Aired on July 27, 2006

17
During an excursion on the repaired Zegapain Caladrius, Shima and Shizuno are away from the main vessel. Meanwhile, Minato and the Oceanus crew face a threat from Sin, who has successfully infiltrated the ship. Sin’s objective is to interrogate the Cerebrants regarding their motivations for fighting the Gards-orm. After receiving an answer from Ryoko that satisfies him, Sin proceeds to restore Ryoko's damaged data. This sequence of events highlights the tension between the crew's defense efforts and Sin's internal investigation into the conflict's origins, culminating in the restoration of Ryoko's information following the interrogation.
Episodes
- Ep. 13 · Ryoko becomes Kyo's pilot but dies when Zegapain Altair is destroyed by Sin.
- Ep. 14 · Kyo processes grief over Ryoko as Lu Sheng explains humanity's server storage and Shizuno locates Ryoko in Altair data.
- Ep. 15 · Kyo faces server reset reality as Zegapain Hraesvelgr suffers heavy damage fighting Coatlicue.
- Ep. 16 · Maihama Server Resets as Ryoko Returns Comatose and Kyo Faces Existential Pain
- Ep. 17 · Shima and Shizuno explore the Zegapain Caladrius while Sin infiltrates the Oceanus to question the Cerebrants.
- Ep. 18 · Ryoko's Emotions Locked in Altair While She and Kyo Explore the Real World
- Ep. 19 · Lu Sheng questions Shizuno's identity as Yehl during a tense dinner meeting.
- Ep. 20 · Shizuno and Shima reveal the Maihama server's relocation to the moon by the previous Kyo.
- Ep. 21 · Shima exposes Cerebrum's plan while Kuroshio considers becoming a Gards-orm.