Attack on Titan is an anime series adapted from the manga of the same title by Hajime Isayama. It is set in a world where humanity lives inside cities surrounded by enormous walls due to the Titans, gigantic humanoid beings who devour humans seemingly without reason. The story follows the adventures of Eren Yeager, his adopted sister Mikasa Ackerman, and their friend Armin Arlert, whose lives are changed forever after a Colossal Titan breaches the wall of their home town. Vowing revenge and to reclaim the world from the Titans, Eren and his friends join the Scout Regiment, an elite group of soldiers who fight Titans.
Produced by IG Port's Wit Studio and directed by Tetsurō Araki, Attack on Titan was broadcast on the Mainichi Broadcasting System from April 7 to September 29, 2013, and later aired on Tokyo MX, FBS, TOS, HTB, TVA and BS11. Both Funimation and Crunchyroll have streamed the series with subtitles on their respective websites. Funimation has also licensed the anime for home video release in 2014. Episode 1 of the English version premiered at Anime Boston, with other episodes put on Funimation's subscription services. On television of the series has broadcast weekly on Adult Swim's Toonami block on May 3, 2014, starting at 11:30 p.m. EST.