The 57th Exterior Scouting Mission arc

The 57th Exterior Scouting Mission arc (第57回壁外調査) is the fifth story arc of the Attack on Titan anime.

Introduction
The Scout Regiment has set out from Calaneth District, heading for Shiganshina while evading what Titans they encounter. However, havoc falls upon Erwin Smith's formation when a Female Titan attacks the right flank, seemingly hell-bent on finding Eren Jaeger and taking him alive.