Finch's field day as a substitute teacher is very impressive.
Finch demonstrates how much compassion he has. He is a very great character that has good morals and a moral compass that moves the show. He drives the show because of his programming design to make the Machine save life. To never put one life ahead of another. I guess what I am saying is the show POI depends on Finch. Reese is a great character and trying to rehabilitate from his past deeds. But this was a Finch-centric episode and a damn good one.