Chapter 20 — Erwin Smith: 57th Expedition Beyond the Walls (4)
Erwin Smith is the twentieth episode of the Attack on Titan anime. the soldiers of the Survey Corps attempt to break through the Female Titan's defense in order to find out the identity of the person inside. (Source: Wikia)
Other chapters
- Chapter 1: To You, 2,000 Years in the Future: The Fall of Shiganshina (1)
- Chapter 2: That Day: The Fall of Shiganshina (2)
- Chapter 3: A Dim Light in the Darkness of Despair: Humanity Rises Again (1)
- Chapter 4: Night of the Graduation Ceremony: Humanity Rises Again (2)
- Chapter 5: First Battle: Battle of Trost (1)
- Chapter 6: The World the Girl Saw: Battle for Trost (2)
- Chapter 7: The Small Blade: The Battle for Trost (3)
- Chapter 8: Hearing the Heartbeat: The Battle for Trost (4)
- Chapter 9: Where the Left Arm Went: The Battle for Trost (5)
- Chapter 10: Response: The Battle for Trost (6)
- Chapter 11: Icon: The Battle for Trost (7)
- Chapter 12: Wound: The Battle for Trost (8)
- Chapter 13: Primal Desires: The Battle for Trost (9)
- Chapter 14: Still Can't See: Night Before the Counteroffensive (1)
- Chapter 15: Special Ops Squad: Night Before the Counteroffensive (2)
- Chapter 16: What Should Be Done: Night Before the Counteroffensive (3)
- Chapter 17: Female Titan: 57th Expedition Beyond the Walls (1)
- Chapter 18: Forest of Giant Trees: 57th Expedition Beyond the Walls (2)
- Chapter 19: Bite: 57th Expedition Beyond the Walls (3)
- Chapter 20: Erwin Smith: 57th Expedition Beyond the Walls (4)
- Chapter 21: Crushing Blow: 57th Expedition Beyond the Walls (5)
- Chapter 22: The Defeated: 57th Expedition Beyond the Walls (6)
- Chapter 23: Smile: Raid on Stohess District (1)
- Chapter 24: Mercy: Raid on Stohess District (2)
- Chapter 25: The Wall: Raid on Stohess District (3)