Episode 22

Nagisa's Time is the twenty-second episode of the Assassination Classroom anime and the final episode of Season 1. The episode first aired on June 19, 2015.

Summary
With Takaoka now revealed, Nagisa must face the monstrosity that is him. Will he be able to do it!?

Plot
Nagisa's rage prompts him to pick up the knife and state that he will kill Takaoka. The class worries that Nagisa may have lost control and may actually do it, until Terasaka throws his stun rod at Nagisa and snaps the latter out of his bloodlust.

Terasaka implores him to not waste his chance at killing Korosensei by getting himself arrested for murder before collapsing from the poison. Heeding Terasaka's words, Nagisa obeys and takes off his jacket, ready to knife. He also picks up the stun rod but then tucks it away. Takaoka then reveals that he has three spare vials of antidote on him. However, they are not enough to cure all of the ill-affected students, but it is their only choice.

The boy and Takaoka then begin the rematch. Still, but the former soldier's high alertness and combat skills do not allow Nagisa to find an opening to attack, and is promptly getting beaten up. Korosensei advises Karasuma to intervene should things turn sour for Nagisa. However, Terasaka states that he won't need to, saying that Nagisa still has a trick left up his sleeve. Takaoka sees the badly beaten Nagisa and gloats that he will use the boy as a trophy for his sadistic pleasures.

However, Nagisa smiles to his opponent's unease, thinking that the conditions are set. He recalls his short time with Lovro at the school before leaving for the island and the technique the retired hitman has taught him. Like before, Nagisa slowly walks up to Takaoka with the knife in one hand. The boy makes the soldier focus his attention only on the blade. Nagisa then lets the knife drop, which distracts Takaoka and fakes him out with a sudden loud clap.

At this, Takaoka is momentarily stunned, allowing Nagisa to close the gap and use the stun rod to electrocute Takaoka into submission. As his opponent wonders what had happened, Nagisa decides to thank Takaoka for everything he had taught the class despite his sadistic nature and gives him a bloodlust-filled smile to cap it off before stunning him again.

With Takaoka finally defeated, the class celebrates and congratulates Nagisa. However, their celebrations are cut short when realising the small amount of antidote left will not save everyone. Gastro, Grip and Smog then arrive at the helipad, seemingly wanting to restart their fights. Karasuma states that with their employer's defeat, the hitmen are free of their contracted obligations. Gastro agrees, only wanting to tell the class that their friends had never been in any danger. When Takaoka revealed to him that he had never planned on handing the antidote over to the class, the hitmen agreed to swap the real virus out for a fake one.

Not doing so would have caused their reputations to crumble by the killing of innocent kids. Smog hands the medicine for the fake virus over, telling them that it will cure the sick students. Karasuma has the hitmen taken away to be further questioned, and Takaoka strapped out by helicopter before the rest of the class make their way back to their hotel. On the way, Nagisa thanks Terasaka for breaking him out of his bloodlust rage and not make a terrible mistake. Terasaka brushes it off, stating that Nagisa's absence will only reduce their chances of killing Korosensei.

The class returns to the hotel, finding their ill friends to be steadily recovering. Terribly exhausted from the night's events, the students slept until the afternoon of the next day. Dressed in their PE uniforms, the students watch as Korosensei is sealed away under anti-sensei BBs and concrete, coordinated by Karasuma. After 24 hours are up, the concrete shatters in a colossal explosion. Although they question if it worked, the class already knew the answer as Korosensei, back in his normal form, lands behind them. They spend the rest of their time on the resort having fun and return to Kunugigaoka Junior High to start their second semester of assassination.

Episode Notes

 * All the previous episodes' titles are based on their corresponding chapter titles in the manga. However the chapter titled Nagisa's Time occurs much later.