In the end, the casting saved the show from. An otherwise patronising show.
I'm so tired of school bullying scenes, I skipped that episode entirely.
The first half was more balanced, then it abruptly be one a crime show.
Kim Ji Hoon gets typecast as the villain too much, and his "crazy eyes routine" are not effective anymore, expecially when border parody, like in this instance.
You could tell Kim Jae Wook and Park So Dam were having a lot of fun in their part.
Oh Jung-se gets the most screen time so we get to empathise a bit more with him.
What it left in the end is the crazy moto chase and the serial killers duel.