Shingeki no Kyojin Episode 21 English Subbed Episode Title:Crushing Blow: The 57th Exterior Scouting Mission, Part 5.Episode Description:Erwin tells Hange that it was a mistake to think all intelligent Titans are like Eren, since the Female Titan has unique abilities far beyond that of a novice. Elsewhere, the mole transforms into the Female Titan and chases after Levi's squad. Armin theorizes that the mole is someone who had seen Eren transform during the invasion of the Trost District...