The WORST seasons of Assassination Classroom

Every season of Assassination Classroom ever, ranked from worst to best by thousands of votes from fans of the show. The worst seasons of Assassination Classroom!

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?

Last Updated: 2/1/2026Network: Fuji TVStatus: Ended
Season 1
star
7.72
391 votes

#1 - Season 1

First Aired 1/9/2015

A class of junior high "misfit" students who are tasked with assassinating their new teacher, an octopus-like creature nicknamed Koro-sensei, who destroyed the moon and threatens to destroy Earth in a year. The students have to learn to balance their assassination attempts with the lessons from Koro-sensei, who is surprisingly an excellent teacher, while the government offers a ¥10 billion reward for his head. Each episode often focuses on individual students, their growth, and their internal conflicts between wanting to kill their teacher and growing to care for him.

Season 2
star
8.26
270 votes

#2 - Season 2

First Aired 1/7/2016

Class 3E and while some things have changed, the class assignment is still the same: kill their teacher before the end of the year. Easier said than done since Koro Sensei's made it clear he won't go down without a fight.