Smile: Assault on Stohess, Pt. 1

Smile: Assault on Stohess, Pt. 1

Available on Prime Video, Crunchyroll
S1 E23: The 57th expedition outside the walls had a hidden objective: to reveal the presence of an enemy within humanity, someone who could transform into a titan and who was plotting to destroy the walls. However, the survey corps failed in this goal.