"Attack on Titan" Season 1, Episode 2, "That Day: The Fall of Shiganshina, Part 2," explores the brutal aftermath of the wall breach, highlighting humanity's loss of territory and the internal, ruthless survival strategies implemented by the government. The episode initiates key mysteries, including the significance of the basement key, and shifts character focus towards themes of trauma, helplessness, and the desperate vow to fight back. Detailed insights are available at Attack on Titan Wiki .