Given that this covers episodes 1–25, “13” isolated likely refers to the release group’s internal revision number, not the episode count.
Following the battle, Eren is placed in an underground jail cell under the custody of the Military Police. He is visited by Commander Erwin Smith and Captain Levi of the Scout Regiment. Erwin shows him the key to his father's basement, and Levi officially accepts Eren into his squad, though under strict supervision. Shingeki No Kyojin 1-25 -Attack On Titan Season 1--720p- 13
Beyond the high-octane action, Season 1 establishes deep thematic roots that resonate throughout the entire series: Given that this covers episodes 1–25, “13” isolated