Assassination Classroom Second Season Episode 19: Outer Space Time
Episode 19 of 25 of Assassination Classroom Second Season, aired May 20, 2016, 23 minutes. Available with English subtitles and dub where released.
Episode summary
Class 3-E has agreed to try and save Koro Sensei. In order to do this, they must track down confidential information -- information that takes the class to another height.