Attack on Titan season 3 episode 12 Night of the Battle to Retake the Wall
Hange is unable to analyse the Titan Serum's formula because of its volatile nature so Erwin entrusts it to Levi in the event it must be used to turn someone into a Titan. Erwin confirms arrangements are in place to retake Wall Maria, then he reveals a secret plan to use the Scouts to search the Yaeger family's basement. After the rest of the lieutenants leave, Levi tries to convince Erwin that Hange should command the Scouts, but he insists on leading the operation. On the night before their mission, the Scouts are treated to meat for dinner. Tensions are high, leading to a fight over portions and Eren provokes a fight with Jean. Later, Eren, Mikasa and Armin reminisce over their past, and reflect on their hopes for a future of life beyond the walls. On the eve of the operation to retake Wall Maria, the people of Trost gather to cheer on the Scouts and wish them success. As the Scouts ride out, Bertholt and Reiner stand guard on Wall Maria. In a mid-credits scene, Levi berates a shocked Eren and Mikasa, while standing beside two apparent corpses. He smacks Eren over the head which prompts Mikasa to hold him at blade point.