Attack On Titan: The 8 Most Disturbing Moments (so Far)

Seen in The World the Girl Saw, this episode was the first piece of concrete evidence that Titans weren't the only bad thing in the world. When young Mikasa's blissful family life was shattered by a particular nasty group of men, an equally young Eren decided to take matters into his own hands. And with brutal resolve.

Thus the youthful innocence of these two characters was irreparably shattered. Fortunately, the bad guys came off worse. But becoming killers at such an early age meant that military life was the only real future option for the childhood friends. It was another major eye-opener as to why they embarked on their chosen path.

This flashback revelation was quite early on in the show's life. But this new dimension to Eren and Mikasa's personalities meant that audiences were never able to look at these two characters in the same way again. It also explained why Mikasa was so emotionally neutral and why the bond between her and Eren was so tight.