Neon Genesis Evangelion - Season 1 Episode 18 Ambivalence Mankind's greatest fear is mankind itself.
Overview: Evangelion Unit-03 arrives from the United States. However, its activation experiment brings out NERV's worst nightmare when it turns out to have been infected by the Thirteenth Angel. The other EVAs are dispatched to battle the Angel-infected abomination... even at the risk of killing its helpless pilot.