The students of class 3-E have a mission: kill their teacher before graduation. He has already destroyed the moon, and has promised to destroy the Earth if he can not be killed within a year. But how can this class of misfits kill a tentacled monster, capable of reaching Mach 20 speed, who may be the best teacher any of them have ever had?
A creature who blasted the moon into a crescent shows up at Kunugigaoka Junior High School and gives the students a year to assassinate him.
The reasoning behind the E Class's segregation is revealed. Nagisa tracks Koro Senei's weak points in the hopes of using them to take him down.
The brilliant, belligerent Karma Akabane, Nagisa's former classmate, joins 3-E and immediately jumps into the assassination mission with both feet.
A new foreign-language teacher comes to 3-E with some major ulterior motives.
Before the torturous school assembly begins, Okuda attempts to poison Kpro Sensei in an unexpected way. With unexpected results.
Koro Sensei gives his aspiring assassins an ultimatum as they battle a grueling test and disdain from the rest of the school.
The students go on a school trip to Kyoto where they must still keep assassination on their mind.
Kayano and Kanzaki are kidnapped by students from a rival school. The school is busy preparing for their long-awaited trip to Kyoto when it occurs.
A new student joins the E Class with a single minded focus on assassination that drives her fellow classmates to distraction.
Professor Jelavich is forced to prove her assassin skills when her mentor pays a visit to the school. Koro Senei takes Nagisa and Karma on a trip they will never forget.
A new assassin student with a goal to kill korosensei joins Class E.
The E Class boys must play the Baseball Club in an exhibition game meant to humiliate them.
Mr. Takaoka upsets others with his unconventional training methods when he comes to help Mr. Karasuma; Nagisa shows a hidden talent.
Koro Sensei exposes a major weakness while Terasaka interrupts a fun summer day with an assassination attempt that goes just a bit too far.
Final time arrives and Koro Sensei gives his class a new goal. He offers the class a tempting reward and the E Class makes a deal with the A Class's top tier Big Five.
The results are in after two days of exams. Both the ace A Class and the end E Class has to come to terms with the outcome as well as Koro Sensei.
The E Class trains intensely with a professional killer in order to prepare for their island assassination. Once they arrive at the island they must make sure everything falls in place.
The summer training assassination attempt is followed by a unexpected crisis that affects almost half of the E Class students.
The E Class students have to put the lessons they have learned into practical use when the unexpected crisis forces them to deal with a hotel full of bad guys without Koro Sensei's help.
The group of students from E Class head upwards in the hotel facing more assassins as they go.
The students meet the shadowy figure orchestrating their fellow students sickness after facing one last assassin. The mastermind wants Koro Sensei in exchange for the virus remedy.
The students of E Class arrive to a showdown on the roof as Nagisa battles for his fellow classmates lives.
Complete episode guide for Ansatsu Kyoushitsu with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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E Class starts studying differently off the campus after an accident; The students start to worry about their midterm exams.
E Class must face off against a powerful foe alone after a fall out with a professor.
Koro Sensei and Mr. Karasuma find the Reaper's hideout and no one knows who will come out on top.
Nagisa tries to accept his talent; students consider possible future career paths.
E class competes with the rest of the school for the highest sales totals at the school's festival.
At exam time, a class is once again a huge threat; Asano has a trick up his sleeve.
Asano makes a big wager with Koro Sensei; The exams end with a very difficult final problem.
E Class puts on a play with twists at the drama festival; Asano remembers his first education job.
E Class cleans up after the festival; a classmate has a secret connecting to Koro Senei's past.
E Class is stunned after learning about Koro Sensei's past; they become unsure of their plans.
With the class split over whether to kill Koro Sensei or save him, Koro Sensei makes a suggestion.
Koro Senseu's fate comes to a battle between old friends; a new obstacle throws a wrench into the plans.
Class 3-E goes to lengths to track down information that might help them keep Koro Sensei alive.
With high-school entrance exams looming, Nagisa is unsure which path his future should take.
Koro has one more project planned for his E Class, but the government's plans get in the way.
The students fight to see their teacher one last time; a figure from Koro Sensei's past arrives.
A pitched battle between two super creatures threatens to harm the students of Class 3-E.
E Class students must decide whether to kill the teacher who changed their lives over the past year.
Graduation Day: The students and teachers of Class 3-E go on to forge their own paths in the world.