On this episode, the class goes against the last assassin guard. Later, they face the mastermind who they met in the past.
Jeez, this plot really turns out be major and is probably one of the darkest in this series aside being the season finale. Also I was kinda surprised to see the evil mastermind turned out to be someone that the class encountered from the past. Other than that, the cliff hangers for this plot seems to be a bit too much since it's already passed around four episodes (or more) but it's still fortunately exciting. Now how will Nagisa and the class counter the mastermind? Overall, more cool action and mastermind revealed.
Conclusion: More cool action and mastermind revealed.