Attack On Titan: Season 2, Episode 31

Following the battle at Utgard, Ymir is brought with the rest of the scouts atop Wall Rose. Historia, whose true origins in the Reiss family are now known to the scouts, insists that Ymir is not an enemy of humanity. Elsewhere atop the Wall, Reiner begins to despair at his brush with death back at Utgard, though his spirits are lifted when Bertholdt suggests heading for their hometown soon. Once the other recruits reach the top of the Walls and are brought up to speed, Garrison Captain Hannes arrives with news that no breach was discovered in Wall Rose. As the puzzled scouts prepare to head for Trost District to regroup, Reiner calls Eren aside and reveals his identity as the Armored Titan and Bertholdt's as the Colossal Titan. He promises that if Eren comes with them to their hometown, humanity will be spared.