
An alien race called Gauna has destroyed Earth. leaving humanity struggling to survive aboard the spaceship Sidonia. Even though it’s been a century since the last encounter with the Gauna, military service is mandatory. For Nagate Tanikaze, whose grandfather secretly hid him in the forgotten bowels of Sidonia, it’s a strange new world as he’s forced to come to the surface. Yet his recruitment comes just in time, for the Gauna have suddenly reappeared.
Browse episodes by season for this series.


2014-04-11
Aired 2014-04-11
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.

2014-04-18
Aired 2014-04-18
Nagate is haunted by his first combat experience against the Gauna. Later, he meets the elite pilots of Sidonia.

2014-04-25
Aired 2014-04-25
Exploring Sidonia, Nagate makes an enemy of Kunato while protecting a friend. The Gauna attack, calling the pilots into action.

2014-05-02
Aired 2014-05-02
After a disaster aboard Sidonia, Nagate and his team are ordered to retrieve a valued weapon. He later defies orders to save a friend.

2014-05-09
Aired 2014-05-09
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.

2014-05-16
Aired 2014-05-16
Nagate and his squad graduate as pilots and are quickly sent into combat when the enemy returns; Kunato explores Nagate's history.

2014-05-23
Aired 2014-05-23
The enemy is revealed to be even larger and deadlier than previously believed, resulting in three squads engaging in a deadly fight.

2014-05-30
Aired 2014-05-30
Nagate is blamed for a defeat and harbors guilt over a casualty; the early years of Sidonia are revealed.

2014-06-06
Aired 2014-06-06
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.

2014-06-13
Aired 2014-06-13
Pacifists endanger themselves by leaving the relative safety of Sidonia, while the enemy shows up larger and fiercer than before.

2014-06-20
Aired 2014-06-20
A large strike force encounters an enemy unit that takes them by surprise; Nagate does what he can to protect his friends.

2014-06-27
Aired 2014-06-27
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.
Viewers who watched Knights of Sidonia also enjoyed