Trusting in the abilities of his comrades, Eren retreats as Squad Levi attacks a newly transformed Female Titan. However, its abilities catch the Scouts off-guard before all are killed one by one. In a rage, Eren transforms into his Titan form to battle the monster himself.
Eren relentlessly assaults the Female Titan, but eventually he is defeated as Mikasa comes to his aid. Biting Eren out of his Titan’s nape, the Female Titan retreats while Mikasa pursues it. Levi arrives afterward, joining Mikasa to pursue the Titan from a distance.

You can watch Attack On Titan Episode 21: Crushing Blow: The 57th Exterior Scouting Mission, Part 5 online for free in the next link:

PART 1

PART 2

PART 3

PART 4

PART 5