

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.
WritersTsutomu Nihei, Sadayuki Murai

Commencement
Apr 11, 2014
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
Apr 18, 2014
Nagate is haunted by his first combat experience against the Gauna. Later, he meets the elite pilots of Sidonia.

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

Sacrifices
May 2, 2014
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
May 9, 2014
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
May 16, 2014
Nagate and his squad graduate as pilots and are quickly sent into combat when the enemy returns; Kunato explores Nagate's history.

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

Immortality
May 30, 2014
Nagate is blamed for a defeat and harbors guilt over a casualty; the early years of Sidonia are revealed.

Empathy
Jun 6, 2014
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
Jun 13, 2014
Pacifists endanger themselves by leaving the relative safety of Sidonia, while the enemy shows up larger and fiercer than before.

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

Home
Jun 27, 2014
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.

ZeBlah
@TheBlah
Not a "good" anime, but it might still be worth watching it. Personally, if this makes any sense, I mostly did not really like it, but at the same time I did not regret having watched it. (watched so far season 1 & 2)