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Assassination Time
Episode number: 1
Overview: A creature who blasted the moon into a crescent shows up at Kunugigaoka Junior High School--and he's giving the students a year to assassinate him!
Baseball Time
Episode number: 2
Overview: The reasoning behind the E Class's segregation is revealed. Nagisa tracks Koro Sensei's weak points in the hopes of using them to take him down.
Karma Time
Episode number: 3
Overview: The brilliant, belligerent Karma Akabane, Nagisa's former classmate, joins 3-E and immediately jumps into the assassination mission with both feet.
Grown-Up Time
Episode number: 4
Overview: A new foreign-language teacher comes to 3-E with some major ulterior motives... among other things. Will she get any closer to killing Koro Sensei?
Assembly Time
Episode number: 5
Overview: Before the torturous school assembly begins, Okuda attempts to poison Koro Sensei in an unexpected way... with unexpected results.
Test Time
Episode number: 6
Overview: Time for midterms! Koro Sensei gives his aspiring assassins an ultimatum as they battle a grueling test and the disdain of the rest of the school.
School Trip Time, First Period
Episode number: 7
Overview: The students go on a school trip to Kyoto, where they must still keep assassination foremost in their minds. Kanzaki faces trouble from her past.
School Trip Time, Second Period
Episode number: 8
Overview: The E Class gives a pro sniper plenty of chances to take down Koro Sensei, then try to make the most of what's left of their school trip to Kyoto.
Transfer Student Time
Episode number: 9
Overview: A new student joins the E Class with a singleminded focus on assassination that drives her classmates to distraction. Koro Sensei to the rescue!
L and R Time
Episode number: 10
Overview: Irina is greeted by her former master, retired assassin Lovro, who thinks she should give up as she has no chance of killing Koro-sensei.
Transfer Student Time, Second Period
Episode number: 11
Overview: Class 3-E prepare for the arrival of their second transfer student, who is allegedly more powerful than Ritsu.
Ball Game Tournament Time
Episode number: 12
Overview: A baseball tournament is to be held, in which Class 3-E are forced to play an exhibition match against the top players of the school's baseball club, which Sugino used to be a part of.
Talent Time
Episode number: 13
Overview: As Karasuma briefly senses what appears to be a fearsome aura coming from Nagisa, Akira Takaoka, an aquaintance of Karasuma from the Ministry of Defense, is sent to Class 3-E to take over Karasuma's role as P.E. teacher.
Vision Time
Episode number: 14
Overview: Koro Sensei exposes a major weakness, and Terasaka interrupts a fun summer day out with an assassination attempt that goes a little too far.
End-of-Term Time
Episode number: 15
Overview: For finals, Koro Sensei gives his class a new goal--with an irresistible reward. The E Class makes its own deal with the top-tier A Class's Big Five.
School's Out - First Term
Episode number: 16
Overview: After two days of exams, the results are in. Both the ace A Class and the end E Class must come to terms with the outcome--and so must Koro Sensei.
Island Time
Episode number: 17
Overview: The E Class trains intently under a pro killer to prepare for their island assassination. Once there, they must make sure everything falls into place.
Action Time
Episode number: 18
Overview: The summer assassination attempt is followed by a crisis affecting nearly half the E Class. Can the rest think and move fast enough to save them?
Pandemonium Time
Episode number: 19
Overview: The E Class must put their lessons into practice as they tackle an intimidating hotel brimming with baddies--and all without Koro Sensei's help.
Karma Time, Second Period
Episode number: 20
Overview: Karma must use his head to get past a formidable foe. Nagisa goes undercover as the E Class continues to sneak its way to the hotel's top floor.
XX Time
Episode number: 21
Overview: The students take on one last assassin opponent before meeting the shadowy figure who's holding the virus remedy hostage in exhange for Koro Sensei.
Nagisa Time
Episode number: 22
Overview: Before Nagisa completely gives into his anger, Terasaka throws a stun-gun at him, urging him not to become a murderer and think about what's truly important.