"The World the Girl Saw: The Struggle for Tro... (Mid-Season finale, 22-minute episode)

"The Struggle for Trost, Part 10" (June 30, 2013)

Produced by Wit Studio and directed by Tetsurō Araki, Season 1 originally aired in Japan from April 7, 2013, to September 29, 2013. While the series would eventually span four seasons (with the final season split into multiple parts), the debut season stands as a tight, self-contained introduction to the dark, post-apocalyptic world created by Hajime Isayama.

Here is the episode list for Season 1:

"The World the Girl Saw: The Struggle for Trost, Part 4" (August 11, 2013)

"The Struggle for Trost, Part 2" (May 5, 2013)