Scream (Episode)

"Eren... Listen... I need to tell you something. You've always... been at my side. Thank you. You showed me... how to live with purpose. Thank you. And you... You wrapped this scarf around me. Thank you."

- Mikasa shows her gratitude for everything Eren has done

Scream (叫び) is the 12th and final episode of the 2nd season and the 37th episode overall of the Attack on Titan anime, produced by Wit Studio and Production I.G.

Overview
After Hannes is eaten by the Titan which killed Eren's mother, Eren suddenly unleashes an incredible power upon the Titan, causing the other Titans to swarm it and tear it to pieces before chasing Reiner and Bertholdt away. For her own reasons, Ymir leaves the Scouts and retreats with the warriors.

The Scouts later conclude that the Titans which invaded Wall Rose were in fact the human citizens of Ragako. As Eren devotes himself to discovering how to use his newfound power, a recovering Erwin concludes that the truths of the world will soon be known.

Unyielding Vow
''Through extensive research and accounts of various incidents, it has become clear that the scourge of Titans which have long plagued humanity are of human origin. The Colossal Titan which destroyed the wall at Shiganshina District is a human possessing the ability to transform into a Titan, demonstrated by its intent to breach the wall with the purpose to exterminate humans. Titans are not sent by the heavens to punish us for our sins, but invaders that must be driven back. Thus, we swear, by the blood our brothers and comrades spilled waging war against this foe, we shall not relent our lands nor yield the fight.''