Season
Episodes
Commencement
In isolation his entire life, Nagate must adjust to life in a centuries-old space colony while training as a cadet pilot to fight an ancient threat.
Oblivion
Nagate is haunted by his first combat experience against the Gauna. Later, he meets the elite pilots of Sidonia.
Glory
Exploring Sidonia, Nagate makes an enemy of Kunato while protecting a friend. The Gauna attack, calling the pilots into action.
Sacrifices
After a disaster aboard Sidonia, Nagate and his team are ordered to retrieve a valued weapon. He later defies orders to save a friend.
Adrift
Nagate and Shizuka, adrift in space, slowly run out of supplies as they await rescue from a departing Sidonia, which is too far away to send help.
Salutations
Nagate and his squad graduate as pilots and are quickly sent into combat when the enemy returns; Kunato explores Nagate's history.
Resolve
The enemy is revealed to be even larger and deadlier than previously believed, resulting in three squads engaging in a deadly fight.
Immortality
Nagate is blamed for a defeat and harbors guilt over a casualty; the early years of Sidonia are revealed.
Empathy
The Gauna find a distressing way to demoralize and out-fight the attack force. Nagate returns to Sidonia with a prize that may help in the fight.
Decisions
Pacifists endanger themselves by leaving the relative safety of Sidonia, while the enemy shows up larger and fiercer than before.
Collision
A large strike force encounters an enemy unit that takes them by surprise; Nagate does what he can to protect his friends.
Home
Nagate fights one-on-one with the heart of his enemy while the strike force does not fare well in its attack on the Gauna.
Cast
Ryota Osaka
Nagate Tanikaze (voice)
Sayaka Ohara
Captain Kobayashi (voice)
Takahiro Sakurai
Norio Kunato (voice)
Aki Toyosaki
Izana Shinatose (voice)
Tomohiro Tsuboi
Ichirou Seii (voice)
Hisako Kanemoto
Yuhata Midorikawa (voice)
Satomi Arai
Lala Hiyama (voice)
Eri Kitamura
Honoka Clones (voice)
Atsuko Tanaka
Ittan Samari (voice)
Kohsuke Toriumi
Kouichi Tsuruuchi (voice)