What Episode Does Eren First Transform Direct

It immediately sparked fear and distrust within the military, leading to the iconic standoff where Eren must prove he isn't a threat to the people behind the walls. How to Watch

At the time, his friends and the military do not realize this "Rogue Titan" is Eren; they only witness a Titan that attacks other Titans instead of humans.

He bursts out from within the Bearded Titan's stomach, emerging as a 15-meter Titan.