第 1 季 共 22 集
播出时间：2015年1月11日
第 1 集 Assassination Time
播出时间：2015年1月11日
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!
第 2 集 Baseball Time
播出时间：2015年1月18日
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.
第 3 集 Karma Time
播出时间：2015年2月1日
The brilliant, belligerent Karma Akabane, Nagisa's former classmate, joins 3-E and immediately jumps into the assassination mission with both feet.
第 4 集 Grown-Up Time
播出时间：2015年2月8日
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?
第 5 集 Assembly Time
播出时间：2015年2月15日
Before the torturous school assembly begins, Okuda attempts to poison Koro Sensei in an unexpected way... with unexpected results.
第 6 集 Test Time
播出时间：2015年2月22日
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.
第 7 集 School Trip Time, First Period
播出时间：2015年3月1日
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.
第 8 集 School Trip Time, Second Period
播出时间：2015年3月8日
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.
第 9 集 Transfer Student Time
播出时间：2015年3月15日
A new student joins the E Class with a singleminded focus on assassination that drives her classmates to distraction. Koro Sensei to the rescue!
第 10 集 L and R Time
播出时间：2015年3月22日
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.
第 11 集 Transfer Student Time, Second Period
播出时间：2015年3月29日
Class 3-E prepare for the arrival of their second transfer student, who is allegedly more powerful than Ritsu.
第 12 集 Ball Game Tournament Time
播出时间：2015年4月12日
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.
第 13 集 Talent Time
播出时间：2015年4月19日
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.
第 14 集 Vision Time
播出时间：2015年4月26日
Koro Sensei exposes a major weakness, and Terasaka interrupts a fun summer day out with an assassination attempt that goes a little too far.
第 15 集 End-of-Term Time
播出时间：2015年5月3日
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.
第 16 集 School's Out - First Term
播出时间：2015年5月10日
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.
第 17 集 Island Time
播出时间：2015年5月17日
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.
第 18 集 Action Time
播出时间：2015年5月24日
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?
第 19 集 Pandemonium Time
播出时间：2015年5月31日
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.
第 20 集 Karma Time, Second Period
播出时间：2015年6月7日
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.
第 21 集 XX Time
播出时间：2015年6月14日
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.
第 22 集 Nagisa Time
播出时间：2015年6月21日
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.
