Call-Back: Kazuma reminds Chris of how he once stole her panties.
Chekhov's Skill: Subaru uses the [Return by Death] penalty to attract the undead army attention towards him, using them as shields against the Destroyer's beams.
Continuity Nod: Aqua complains about the undead piling around her more than anyone else, which also happened in her home series.
Exact Words: Roswall's defense is that maybe they could go home. Otherwise, the entire class would have throttled him for the deceit.
No-Sell: Kazuma's attempts to use [Steal] on the headbands don't work.
Sequel Hook: At the end of this episode, Roswaal reveals Season 2 is coming.
So Proud of You: Tanya, after seeing Kazuma [Snipe] all of the Destroyer's projectiles and then [Steal] a piece of its leg, comments that she would have conscripted him into her battalion.