Attack on Titan

Season 1, Episode 21

Episode Title: Crushing Blow: The 57th Exterior Scouting Mission (5)

Air Date: 2013-09-01

Overview:

After a last act of desperation, the person inside the Female Titan has escaped from the Recon Corps and reverted to their human form. Now, disguised as a member of the Recon Corps and equipped with Maneuver Gear, they finally catch up to their prey — Levi's squad.