Primal Desire: The Struggle for Trost, Part 9
Attack on Titan Ep 13 Title Card
Season 1, Episode 13
General Information
Series Attack on Titan
Kanji 原初的欲求 ―トロスト区攻防戦⑨―
Rōmaji Genshoteki Yokkyū -Torosuto-ku Kōbōsen (9)-
Alternative Translations Primordial Desire
Air Date June 29, 2013 (Japan), August 2, 2014 (USA)
Adapted From 14, 18
Opening Feuerroter Pfeil und Bogen
Episode guide
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Attack on Titan Episode List


Jean spots a corpse with 3D gear on the streets nearby. Meanwhile, Riko and her female comrade retreat when all of their comrades are slaughtered by the Titans. Jean makes a run for it and takes the 3D gear while Connie, Annie and Marco watch a Titan sneak up on Jean. Marco tries to lure the Titan away as a decoy. After Jean falls over due to faulty equipment, Connie distracts the Titan. Jean, Marco, Connie and Annie manage to reach safety. Then, everyone spots Eren carrying the boulder. Ian shouts to everyone to protect Eren at all costs. Despite the risks, Mitabi and his men lure the Titans on foot. One by one, Mitabi and the rest of soldiers are being eaten alive by the Titans. Ian sacrifices his own life to get his comrade out of a Titan's mouth. Eren successfully seals the hole with the boulder. Riko sheds some tears for her dead comrades and shoots a smoke in the air. Commander Pixis and his men are relieved that the operation is successful. He has his men evacuate the soldiers.

Riko urges Armin and the others to retreat when the other Titans are arriving to the scene. When two Titans are about to attack Eren's group, Levi kills the two Titans from behind. After another day, the army fire rounds of cannon fire to kill the rest of the Titans within Wall Rose. At the same time, the army collect some Titans to do research on them. After the battle is over, the army hunts for the dead bodies. As Jean wanders through town, he stumbles upon Marco's corpse. A nurse asks Jean to identify the corpse and urges him to do his job. Jean reluctantly complies with the nurse's orders. Meanwhile, Sasha and the other soldiers are stunned at a scene where human remains are balled up in the Titans' saliva. Reiner tells Annie to move on when he finds her apologizing to a dead body.

Inside a jail cell, Eren wakes up to see he has been imprisoned by Commander Erwin and Captain Levi. While Commander Erwin reveals the key, Eren confirms that there is a secret underneath his basement. Upon hearing Eren's desires to join the Survey Corps to kill the Titans, Levi accepts Eren under his watch.

Points of Interest

  • Titans throw up human remains once they get full since they do not have digestive systems.

Fallen Soldiers

  • Mitabi - stomped to death by a Titan.
  • Ian - eaten alive after risking his life to take a comrade out of a Titan's gaping jaws.
  • Marco - he is last seen alive when he risks his life to save Jean. His death is not shown. His body is half eaten.

Battle Report

  • 897 soldiers are wounded.
  • 207 soldiers are dead or missing.


The following quotes are from the Crunchyroll subtitle script, timestamps are approximate.

Eren: "I want to join the Survey Corps and just slaughter the Titans!"

— Eren's decision


Manga & Anime Differences

The following points show notable alterations from the source material.

  • In the manga, Marco, Jean, Annie, and Connie are not present during the battle to protect Eren.

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